Troubleshooting a No Start, No Spark, No Fuel, No Com (any car)

ScannerDanner Premium is still available on KZbin through August 2018. ScannerDanner Premium will also be available on my website at www.scannerdanner.com. (sept 25th 2017)
Stay tuned for a video update.
In this video I will walk you through a no start, no com using the 5 volt reference circuit as a guide. We will also cover voltage drop testing, why a loaded circuit is important as well as standard relay testing that everyone needs to know. These testing procedures are not car specific and can be applied to anything!
This is a 2006 Lincoln LS.
Tools used
- uActivate Circuit Performance Tester goo.gl/GzZ1Hz
- Bayco NSR-2168B LED Rechargeable Work Light
www.jbtoolsales.com/bayco-nsr...
- OTC 3893 Genisys Encore
www.jbtoolsales.com/otc-3893-...
For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium www.scannerdanner.com/join-sc... There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.

[@martinguitarhd28]

Nice trouble shooting and great demonstration on the 5v ref .Glad i became an online student as everything you say and teach is so easy to understand.Anyone watching the free channel and wanting to go even further ,do as i did and join the premium channel as well and you will be flying through the course in no time.Best teacher by a country mile and the price is awesome.Don't just take my word for it go and try the free trial and you will understand why we rave about Scanner Danner !!!

[@ScannerDanner]

Thanks so much! ScannerDanner Premium will be available directly from my website on the 25th of this month.

[@SmittySmithsonite]

HEAR! HEAR! Couldn't have said it better myself, Martin.

[@martinguitarhd28]

Will be going over to the website and joining there when you are ready so thanks for the update.

[@ScannerDanner]

Thanks for posting this comment here. It means a lot to me right now during this transition period especially. I'm grateful for all of you guys. As much as this material has changed your lives, you guys have changed mine.

[@idada459]

Another great video from the field Paul you are amazing thanks

[@petersonbalavoirjeanbaptis7649]

I'm your student from Haiti.and I enjoy watching your videos carefully,plus every words will come out of your mouth are from a good pro and teacher.and i feel so great when im watching you teacher

[@ScannerDanner]

Thank you! 😃

[@edchobot4990]

Most shops today just keep replacing parts until they find the problem. You sir are a true troubleshooter. Great video.

[@tradekingdistributing3586]

Amazing. You are single-handedly creating an army of automotive diagnosticians. Imagine what the world would be like if every single person was able to find their life's true calling like you have, Paul. You are truly a gift from God to the rest of humanity.

[@ScannerDanner]

Man, that is quite the compliment. In my knowledge of our Creator, and to keep my pride at bay, I will say this: I can do all things through Christ who strengthens me.

[@stefanhinks6480]

I have been a mechanic off and on for the past 23 years. Electrical diagnostics has always been my weakest link, yet just watching this video alone has made so much sense that I can't believe I didn't "get it" beforehand. I am acutally contemplating looking into your online courses because I can obviously learn really well from your teaching methods. I want to thank you for the time and effort you put into your work, and you have every right to be very proud of any mechanics/technicians that you put out there in the workplace. Again, thank you.

[@ScannerDanner]

Thank you so much Stefan! Look forward to hearing from you in the comments should you decide to join www.scannerdanner.com/join-scannerdanner-premium.html

[@gixxercorona]

Don’t think mr danner fools about, even the fact you teach your experience online, have a few students standing at your shoulder with the odd comment of curiosity, you just roll with your diagnoses, it’s great to watch and even you have pride to double check what you say is honesty , to many people out there go for the quick change ( every part scenario till it’s starts ££££$$$$$) keep up the the great work👍🏻 the world is watching a master 👍🏻 keep on rolling sir , all the best from the uk 🇬🇧

[@StevensonWilliams-ui9ri]

N9fdj

[@StevensonWilliams-ui9ri]

How dd😅😮😊7😮r😅ug😅in km🎉

[@sanctealphonse4510]

I love it when you have your students around asking questions and you address them on the video since it's kind of like they're representing all of us less experienced guys and they're asking questions we would ask. I hope you do more like this... Thanks for the videos!

[@ScannerDanner]

Absolutely and thank you!

[@josealers67]

Just finished a crank no start on a Toyota Tacoma 2003 with a 2.7l engine. No communication with my scanner. So I Dannered the vehicle. Check for 5 volt ref and found low voltage. Checked tail relay and it was defective. Replaced and problem fixed. Another one bites the dust. I learned this from the man .Paul Danner and his awesome teachings. Thank you once again . Jose from Puerto Rico. Scanner Danner Premium is a must.

[@ScannerDanner]

Man this is awesome feedback, thank you so much!

[@charlesbroomfield9832]

a relay for tail lights ??

[@scientist100]

Need more explanation on how you go to the relay switch. Did you just check all fuses and got lucky on the bad relay and fixed it?

[@idealgarage6895]

Absolutely helpful paul. I have just worked on the 5.7 liter 3UR-FE engine of a toyota tundra and it turns out that the computer isn't "alive and talking" anymore. This video has given me so much encouragement to get things moving as far as direction is concerned. Besides, I live in the capital city of Nigeria where auto diagnostics is still much like space travel.

[@ScannerDanner]

Awesome! If you need additional help. Don't forget about my forum. It is free to join and we can help you further www.scannerdanner.com

[@pulseofthemaggots7750]

Scanner Danner is such a good mechanic its scary

[@sultansikander7912]

nice work

[@paulbevan1218]

Hello from England. I'm a newbie to your channel and I like what I see. Your a brilliant teacher! and I find myself glued to the computer whilst watching you diagnose none starters like the car in this video. Im not a mechanic, just an old bloke with old school interests in mechanics. Keep up the great work, Im hooked. :-)

[@ScannerDanner]

Thank you Paul!

[@richardostrowski6420]

Great video Paul. What the consumer DOES NOT understand is the fact that the Tech/mechanic needs both the TRAINING and TOOLS in order to do a proper diagnosis. You can't have one without the other. Training and Tools cost money, you NEED to recoup your money or you will not be in business for very long. This is why you/we charge what we do. Yes, it took me 5 minutes to find the problem, but I did find the problem. No PARTS cannon was used. Keep up the good fight.

[@richmhwd]

This is a perfect example of real world symptom and diagnosis . The fact that you stopped after repairing initial complaint shows that you are a money making machine . Great video that can show what ALL auto shops need to do .

[@jeffhesse8415]

What a valuable lesson! Checking 5 volt reference has saved me alot of time. Never trust a relay that clicks. Someone replaced a lot of parts because of a bad relay. 30 years in the business and I'm still learning new techniques. Great video Paul. Thanks for sharing.

[@BigDog50001]

This was actually "premium" material. Good job Danner.

[@ScannerDanner]

Thanks man. It was going to be too but you guys have been waiting for awhile and we are still about 12 days away from getting ScannerDanner Premium moved to my website. And I was certainly not uploading anything more to ScannerDanner Premium on KZbin.

[@BigDog50001]

I hear you, I wouldn't trust KZbin anymore either.

[@josealers67]

4 am . Online just to watch SD. It's not the camera It's the content that's great. Thanks again SD.

[@michaelklein95]

You are truly an awsome teacher. Classroom learning is great, but real world application of that knowledge is invaluable.

[@j.c.smithprojects]

i really enjoy electrical problems. i can hear the excitement in your voice as you are "on the hunt". makes it very exciting for your students. i use a primitive way of checking load and control side of relays....i use jumpers that allow me to check voltage, ground and load amps...same result just with a home made jumper...sever pins sizes also. great video. really enjoyable. loved hearing the students getting involved and thinking through it!

[@whitetiger8652]

Great lesson about relays and 5 volt ref! Thanks Paul and your students for your time it is greatly appreciated.

[@patrickmcdonald3427]

Just now watching this. Color me impressed! Among jobs I had were a nuke plant mechanical supervisor and certified auto mechanic. Retired, I still work on vehicles. This segment on the 5 V Ref. signal has taught me a lot about it! But, I didn't know of it previously being 9 V. I basically started w/ an '81 Cadillac w/ the infamous 6.0 L V8-6-4 MD-Modulated Dusplacement engine. It was 5 V. The 1st DFI-Digital Fuel Injection. You could get sensor info from the ECC-Electronic Climate Control Head (electronic HVAC control) -TPS, ECT, MAT, MAP, BARO, ACT, O2 and closed or open loop. Most don't know that even USB is 5 V. Cell phones are 3.3V. Cascading voltages. 120v wall outlet "transformed down" to 5v USB to 3.3v cell battery. Where I am going w/ this is that ALL voltages must be on spec. The 🔥 points in the relay caused a low voltage to the Ref. circuit. The PCM not getting the correct voltage resulted in the no-start. As far as charging 1 hr diagnostic time, in this case BOTH time and tools bought are money. And more tools as they redesign vehicles. And more training. Same thing w/ the coil, but, it can also be worth it to not charge-gaining a regular customer-especially if you also point out the coolant leak, which you gain as additional work. This, as long as the customer doesn't abuse you. And finally. Your repertorie w/ your students is amazing! Mike Rowe would be proud!

[@ScannerDanner]

Thank you so much!

[@trentay56]

Love what you're doing. On the spot diagnoses from start to finish with details (and a lesson to boot)! Very much appreciated

[@clarkgarber5495]

I love it when a customer gets the bill and says you just replaced a relay! Like when I charge for an EVAP test (I charge a test fee for machine plus labor to inspect and repair) and they say you just replaced a gas cap! They have no idea what it costs to run a full service automotive shop. We need to be paid.

[@Re-tirados]

And your knowledge

[@1locolobo1]

@@Re-tirados yes equipment and time and most of all your knowledge and the expense and time it takes from your life ( although it is a passion for learning and fixing things that not everyone can fix that runs in your veins) you need to be compensated for it. When you get top dollar for you expertise then it makes it all worth your while.

[@jopay8697]

the job wont be quick f u havent study for years..that shud be paid.

[@Ryan-wf1mn]

I would love to be your student when you are troubleshooting! This is exactly how good mechanics are made. Using your head and truly understanding what is happening with components one by one and ruling out unnecessary tracing, saving time, which in turn makes you more money! I’m glad I found your videos bcuz I live for this stuff, thank you!

[@AZBADBOYz]

The common heard of dealer techs would have thrown thousands of dollars in parts towards that. Problem solvers are rare but highly sought after. GREAT JOB!

[@GaryH1989]

Pretty awesome letting your students along because they actually want to take every opportunity to learn more about diagnostic work. Your the man Dan!!

[@OneAuto]

Great job sir! I was looking at the faces of your students behind you soaking up your knowledge...Priceless :)

[@charlesdowns1691]

true

[@johnaclark1]

Another awesome video! Thanks for bringing this to us, Paul! I, too, like having your students there asking questions...it really helps.

[@amadafaka]

johnaclark1 The students did really help especially the question about if its possible the low battery voltage affect 5 volt reference.

[@willyck948]

I was wondering about the 5v reference for a wile too. Now I know why😊

[@traceysumner9815]

Sweet display of teaching and an awesome example of why I need to get your book and premium content! Thank you for your wealth of knowledge brother!

[@scottbarto3760]

This is sooo cool that you not only find the problem but also have students with you to share with them exactly what and why you need to check out the different possibilities !!

[@HomieHektor]

A TON OF VALUABLE INFORMATION IN THIS VIDEO. PAY ATTENTION TO SCANNERDANNER, HE'S NOT GIVING US B.S.

[@johnwrench4speed]

Nice video. As for charging customers for diagnostics, the shops I have have worked at: general diagnostics 1 hr; no start diagnostics 1.5 hrs. After expiration of these time(s) and result no found, call customer and get authorization for more time. No authorization; no more diagnosis.

[@ScannerDanner]

exactly, and for the time spent, you tell them what is NOT wrong with the car

[@damionnanan7787]

Coming from a different technical background being civil engineering I am always fascinated with electronics and how things work. I find your videos very educational and inspiring as it teaches non electrical guys like myself how to tackle a problem by just applying basic knowledge together with technical data to trace and rectify the problem. Thanks as well for explaining why relays need to be check loaded rather than just pull it and looking for voltage. Finally you also taught me that not having a 5 volts reference is a clear indication that something is wrong along the circuit and a bad sensor can cause potential problems by pulling down the whole system causing a no start problem. Oh one more thing checking your fuses and relay once you have 5 volts reference is a key piece of information to ensure the circuit is functioning as expected. Great video and thanks again for teaching us how to analyze and fix potential problems with no start issues.

[@Wrenchlife604]

solid diag. just bought a old school vantage. love that yours is still around and kicking / working

[@turbofiero86]

I have one too, even have the KV module for it

[@billrimmer5596]

Me too. Enjoy using it

[@israelzunigamascorro9300]

Exellent video, I have learned a lot with your videos, thanks for sharing your knowledge with us, take care and blessings for you and your family,

[@mdlm2011]

I went to a trade high school for automotive and the way you teach and allow students to tag along as you diagnosis is awesome! That's invaluable. I wish my teachers would have done this.

[@xxheadshotmasterixx4409]

scanner danner your vid and how you showed your students what to look for ,how you exsplained thing was over the top great teaching .i wish my teachers had done it like you it would of saved me alot ,money and stress you are the man thanks for this vid keep doing what your doing you have a gift

[@sisobesobeso5115]

thank you Mr. Paul i really appreciate your effort to teach people, i have learned a lot from you, again thanks a lot

[@area46241]

AH HaH!!! That was fantastic. Identifying that the jumpered relay at the end was interfering with theft control was masterful. Pure professionalism as they would have said at Wyo tech 30 years ago.

[@throttlebottle5906]

it was triggering the anti-theft system, because it sees it staying on and that is equal to being "hot wired"

[@ScannerDanner]

Exactly!

[@mngaiser]

Great way of explaining things! This guy's an awesome teacher he actually gives you reasons why which is critical to tying ideas together. Thanks!

[@Foxbrendon]

Possibly the best automotive vid I've seen on KZbin. Absolutely fantastic! Thank you so much, Scannerdanner for uploading these videos. Very, VERY appreciated. Thanks from N/W Scotland.

[@ScannerDanner]

Thanks man!

[@pinpointauto3091]

One of the first diagnostics on a blower motor, I learned the hard way used my power probe, had 12v still blower wouldn't turn on (unplugged no load) finally used test light would not light despite showing 12v found bad wire in firewall plug

[@SmittySmithsonite]

My brain leaks knowledge like a sieve - this was a great refresher for me to plug some of the leaks, LOL. Love how you film the path towards the problem - gets the brain working! Amazing how fast I forget stuff now. I forget the meaning of certain automotive acronyms all the time too. Thank God for search engines, lol! Don't get old, kids! :D I'm in the middle of tearing down an old section of my barn to break ground for a new section (that will be my new shop!), so I've taken a couple weeks off, so to speak - if I'm not tinkering with cars every day, what I've learned just seems to go away FAST. This is just telling me that I need to watch your videos EVERY day, and not just when you post new ones! :) I need more hours in a day ... Gotta love FoMoCo power steering pumps - they've made that same noise for DECADES! That one may have been low on fluid, but still ...

[@bienvenidomillare4378]

You are an extraordinary electrical maestro.. even though I didn't fully understand your speech, I still learned something from your actual video sir..

[@stephenwgreen78]

Great video. Hope those students realize how lucky they are too have someone with your skill set / knowledge teaching them. A lot of people learn from someone who would have changed coil packs😁.

[@Kamel419]

Hey just a suggestion... when you get really one off situations like this (relay works, but can't carry it's load) maybe you should keep the broken part for demonstrations later. granted with the videos you have a good document of it, it might be cool to have some examples to give your students some hands on with.

[@felixcat4346]

The fact that the relay is broken is irrelevant. Why? Because it's the McGuffin to make the video. The relay is probably fine.

[@charlesdowns1691]

decent idea

[@JackyK555]

On the switch side of relay contact was bad (corrosion, burnt contact, created a high resistance in reference circuit taking voltage away from reference voltage, which stopped communication with car computer creating an engine no start. That’s my take away from this video. I think that’s what I observed. Thanks for taking the the time and effort in becoming one of the top dogs in your vocation and sharing your exceptional skills and knowledge with students and public, it is appreciated and noticed. You sir are a Great American.

[@ScannerDanner]

Thank you sir! And you were close. Correct on the relay part, but it was low or no power to the PCM (as well as other circuits) that prevented the PCM 5v supply from being sent out to its sensors. In other words the relay circuit itself, was not part of the 5v reference circuit directly. Hope that makes sense.

[@JackyK555]

Thank you , I now realize the defective relay caused the loss of power supply to PCM and related circuits.

[@ScannerDanner]

@@JackyK555 yes sir! And you're welcome

[@akosnuveso1214]

Thanks alot am a technician who learnt alot from your channel

[@roadkill5333]

Wow, Scan!! That was an exciting video!! I was guessing the whole time!! And just as neat, the problem showed up with the school kids in tow!! Ahhh, I mean, with your students accompanying you!! ;-) Now, for some foolishness! This time, we had a Dan on video!! Along with a James, only prettier!! The scanner wasn't much help, so you will have to change your KZbin handle to: WIRINGDIAGRAMDANNER!! (Sorry, but "Eric the car guy" was used already.) This time, none of your students floated an air biscuit at ya!!! I'm impressed!! I have a hard time getting all the way thru an awesome instructional video with a fart. Or two!! If they complain about how much you charged for the ignition misfire diagnosis, you can explain it this way!! "I only charged $1 dollar to plug in the ignition coil!! I charged (what ever your basic hourly charge is, minus one dollar) the other amount to know how to find the correct ignition coil to plug in!! Give all of the students a big high five, for being studious and professional, and a big hug for not squeezing cheese on camera!!

[@jrsgarage3244]

That's why I juggle relays on my Major's first, Don't get me twisted I learned from my competition diagnostic work how to teach my apprentices.

[@ScannerDanner]

moving relays around almost never is the fix, plus I prefer to prove the fault without switching parts :-)

[@comiu]

The troubleshooting process in this video is great! Basic principles + logic = car fixed. Greetings from Romania!

[@davidcote2411]

GREAT VIDEO PAUL. I WAS NEVER AWARE OF THE 5 VOLT REF. TIL 2 YEARS AGO,WHEN I JOINED YOUR ONLINE CLASS. YOU ARE THE MAN. THANK YOU FOR ALL YOUR TIME IT TAKES TO PUT OUT YOUR VIDEOS. AWSOME JOD MR DANNER. THANK YOU

[@dezblyan5125]

David Cote lol me too the 5v

[@WorkWithCesar]

Just thought of another good question that will help everyone out.. How do you charge for diagnostics is it by the hour? What if you can't find the problem 100% but can point them in the right direction? Do you still charge for your time ( it seems like it would be difficult), Do they pay you after they put the part on and verify its fixed or pay you before? It's not like you can wait till they install the part to get paid can you? Thanks again hopes this clears things up

[@ScannerDanner]

Question 1: Flat fee for the first hour (additional time rarely needed but if it is, I charge time involved) Question 2: If I accept the job, there is no such think as "can't". I may need to step away from a problem car for a day but I'll get it, when I come back. And I bill those accordingly Question 3: Paid up front, the day of the diagnosis. The key is having an established relationship with these garages. No one is 100% all the time. I don't care who you are. Upper 97-98% is the goal. That's 2 or 3 miscalls out of 100. But, when you offer your service for the first time to a new garage, there is ZERO room for error. If you get your first one wrong, they won't be calling you back.

[@mattw1393]

Hope James bought the first round after that t-pin incident! Let us never speak of it again. 😉

[@ScannerDanner]

haha nice

[@arielatom03]

Well, they got it back.

[@bobbieking3229]

@@arielatom03 .

[@NobodyAskedForThis]

Great video. Practical and efficient. I had a box truck at my shop that kept running when the key was turned off and removed. I ended up finding the AC relay control circuit within the relay shorted. The short prevented a voltage drop within the control circuit of the relay. The lack of voltage drop caused battery voltage to feed into the ignition run circuit of the PCM. New AC relay corrected this symptom.

[@peterbilt8799]

Tail end of the video, you hit the nail on the head!! How much money have we techs spent on the tools needed to get the job done!! So we not only need the education but without the tools nothing can be fix!

[@DANNYN224]

Nice job i do mechanics too but schematics not easy to read but i can read it

[@ScannerDanner]

Thank you

[@NewLevelAuto]

Deo Nandkumar look for Jorge Menchus article on reading diagrams

[@ScannerDanner]

Post the link Keith. It will go to spam but I'll unlock it.

[@frugalprepper]

www.garrard.k12.ky.us/userfiles/indexblue/2_2.pdf - Great Article

[@frugalprepper]

If you want to learn a whole lot about analog electronic and diagrams this is the best book for it. Radio shack is out of business but you can still get it on amazon used. www.amazon.com/RadioShack-Communications-Electronics-Electronic-Communication/dp/B000NK9YIQ It is not specifically about auto electronics, but it give you a solid understanding about analog circuits (which is what all sensors are in cars). I started building projects and designing my own circuits when I was 10 using this book and I still reference it on a regular basis.

[@hddm3]

Sweet

[@Ismailmsheikh]

I started this in 1988 from VCRs, into power, Genset controllers, motor controllers etc, but still learnt something from this video!

[@MrFranksplace]

Thanks .been working on cars for a while with no training and that tool for the relay load testing blew me away .keepem coming as am sure theirs alot more am missing .again thanks

[@vt2704]

Damn to all Fords!

[@Just2362]

You miss-spelled Chevy!

[@siriusjones6719]

+Just2362 HAHA, nice!

[@michaelhaiden6718]

ahh back in the day we would just sand the contacts

[@mikechiodetti4482]

Good Diagnostics! Several times before I retired other (fleet) shops would send me no starts and the 5 volt ref would be low. Older Dodge Vans would lose the 5 volt ref, but the ref was used for something inside the van, I think it was the air bag clock spring. I remember changing a few of those and the 5 volt ref came back. I know later vehicles now use multiple 5 volt ref, which is helpful to eliminate total 5 volt ref problems. Glad to see the students had a chance to see what "the real world sees" when diagnosing a problem. Plus you explain details about why you knew once the relay was changed, the 5 volt ref came back, other than the "million dollar bet!" That was funny!

[@AnythingEverythingGh]

Vehicle Problem: Big Problem SD: Problem melt like wax Learning so much, keep it up Champs

[@RC-Heli835]

This has been one of the best vids yet Scanner! Of course all of them are a cut above spectacular. I couldn't help but think of sanding the points when I saw those dirty contacts in that relay. Todays generation may not know what points are but back in the day now and then you had to sand the points to get going again. I had an old boat like that once and I had to sand the points to get back in darn near ever time I took it to the lake. The happiest 2 days in my life was the day I bought it and the day I sold it. I bet if someone just knew where to look, sanding those contacts in that relay would have gotten it going again at least temporarily.

[@Airman..]

Blade cleaning the carbon off the contacts may not work most of the times cause what broke exactly is the latch coil, i am pretty sure its gonna have way less resistance than normal when this happens, the magnetic field ain't strong enough to support the bridge

[@arielatom03]

My favorite video is the one where they had that chevy impala, i think, with the crank sensor code and it was a short in the wiring harness goin to the cam sensor and he was about to call a computer.

[@RC-Heli835]

Airman Yeah I figured that as well but it might get you home from 10 buck 2 if you just knew where to look. It would be a sure bet to take the relay out and put a jumper from pin 30 to 87. I guess we should all keep spare relays and fuses. I do keep fuses but not relays. I don't take any road trips without my diagnostic bag of jumpers, multimeter, pliers, test light, crimps, crimpers, screwdrivers, scan tools and I keep safety pins for back probing on me every day. I guess we never think about one relay shutting down the entire system to where nothing works not even a scan tool. The fuse could do the same thing. I just hate for something simple to make me call a wrecker you know. Its complicated but less complicated after watching scanner danner solve this issue. I have a jumper made up for relays with a circuit breaker and a loop large enough to measure current with my AC/DC amp clamp.

[@IamKurr]

It's nice to come back across this video again. I've got a nissan maxima at the house (sent from a shop) right now that is a no start. One of the first few steps I took was to check for 5v reference and found low voltage on them. This week I should be able to finish up the diagnosis, easily, because of the videos you have put out like this.

[@ScannerDanner]

Awesome! Thanks Justin

[@noelconnor8539]

Brilliant tutorials, im very very pleased with your teachings,im over 5 hours watching your vids❤❤❤❤❤

[@ScannerDanner]

Thank you and welcome!

[@bradmaynard4692]

you are an amazing teacher. never taken the course but when I get some room on my CC I will be buying your book. great material and presented so clearly. you've even saved me money fixing sensor problems on my ol 94 gmc. 600K kms and still going thanks to guys like you.

[@ScannerDanner]

Nice! Glad to see guys like you putting this stuff to use. Thanks so much for your kind words

[@david_bmx1148]

Where can I find your book???

[@gigshare3947]

​@@david_bmx1148the AESwave store

[@braol]

Awesome video, as always. I love the uActivate. The uTest terminal kit is good to. Use them both all the time. And that's great news about your premium channel being up on the 25th.

[@Crest591]

Awesome, I love the way you track these problems down

[@rudysison9010]

A lot of Info teaching dude..I don't have the tools to test ,just a few but I learn from just watching and listening.

[@rrmech11]

Paul Excellent video. I'm re-doing my Indiana Certified Emissions Repair Technician Course last night. I completed the course in 2009. A lot has changed since. Concentrating on non- communication issues and reprogramming and flashing modules. Perfect timing with this video. Was hoping to see the theft issue to being the next issue and you going threw and reprogramming 2 keys as that is what ford wants to happen for the theft issue. I understand why you didn't have to do it. You and Eric O. Need to have a meet up so I can pack my bags from Indiana. You bet your butt I'm going to join the premium channel at the end of this month. Later Brother

[@ScannerDanner]

Thanks so much!

[@denistodorov4275]

Thank you Paul for greats videos in KZbin ,I learned a lot of you and always like to watch your videos, greetings from Bulgaria!

[@Spitfireseven]

This is the absolutely most elegant diagnosys. Just sensational Scanner Danner.

[@BrandonF601]

Thank you so much for the video Mr. Paul. Cant wait for sept. 25. Last 5v ref issue i had was a shorted fuel tank pressure transducer. Also i totally agree with your take on the 1hr diag....the misfire didnt create the no start. Off topic of the video, but i usually hate driveability issues on pre obd 2 vehicles. Thanks to your premium channel, today I was able to quickly and confidently diagnose and condemn a pcm on a 93 Yota. She had no igt signal from pcm to igniter. And props to the component info on my verus cause alldata, mitchell, & identifix didnt help me for s*** on diagrams.

[@Incountry]

You approach it with a logic series of process, you think logically... Excellent.!

[@adriannyasia]

Man, what a wealth of knowledge Danner is! I wish someone put me on to a school like this when I was a young buc... smdh. What I'd give to further learn diagnostics.

[@jonka1]

Seat of the pants content, very watchable and informative. I see lots of cars where "somebody" got there before me. Great practical demonstration.

[@ScannerDanner]

Thank you!

[@JasonSmith-qx3zh]

ScannerDanner one of the best at what you do and that ain't easy super great vid!

[@BeccaLovesGleee]

Hi Paul used these guidelines you use on a Hitachi excavator today to find fault thanks

[@ScannerDanner]

man, this is what's up right here! These principles apply to EVERYTHING! Thank you for this comment. Made my morning. Sharing this on my FB page now

[@MrTwisted1977]

Fantastic and methodical find as always well done with all due respect and flying colours Mr Danner!!!!!

[@ozzstars_cars]

Nice find. Looks like a good group of students eager to learn the way to do it right!

[@edmarvlog6543]

I learned a lot from you Sir, Dan your student is so lucky to have you.

[@AP9311]

awesome diagnosis! I learned a ton of this stuff!!! I need to get me some of those fancy tools you got. That's so simple to diagnose the 5v ref. I had no idea, I call myself expert. Psh. I'm a newbie now. But I get this now. With few of this video. I'll get the hang of it! Thanks Paul! 😊

[@ritchieschofield1185]

Electrical diagnostics is fast becoming my hobby and my favourite job when at work i love the challenge and the buzz of fixing Electrical faults when others have failed. I was just struggling to find where the switching power comes from. Maybe ign main circuits relay? Fantastic video and a pleasure to learn from you. One of my many YT channels i learn from thank you

[@Automotive_Solutions]

Nice video. Logical and simple. Your students are gaining valuable experience with you.

[@nemanjadzombic6101]

Thank you so much for another perfect video and for explaining why there is 5V instead of 9V that used to be. Perfect explanation as the Whole video is. Greetings from Serbia!

[@Mario241]

I am more excited to see your new videos than any other program on TV or you tube!!! Keep them coming and thanks for the tips :)

[@dezblyan5125]

Mario Lagoudelis ya me too always get excited when Paul does a big start and doesn't give the answer away 😄

[@dezblyan5125]

A no start I mean

[@Re-tirados]

Me too

[@bigpermsgarage6290]

It's always inspiring watching your teaching and troubleshooting techniques.

[@ScannerDanner]

Awesome! To inspire others makes me feel good inside 🙂 Thank you for sharing that

[@baxrok2.]

Fantastic diagnosis guys! Lot's of good lessons in this one. Thanks!

[@brianhind6149]

I compliment you on your teaching. It would a help to teach your students that using a fully charged battery or an external supply when trouble shooting electrics. A low voltage high internal resistance battery can waste diagnosis time, & lead to incorrect conclusions. In this case it didn't matter, but in other cases it could. I love the way you demonstrated an initial series of tests without the help of a diagram. Well done !

[@stephenmarshall5302]

I actually had a voltage supply relay doing the "exact" same thing on a 2006 a6 last month and I fumbled about before I found the relay was bad. Wish I had watched this video. Learning a lot from these scanner scanner videos

[@hiesterconst]

Great video!!! Always so professional and helpful. Great job!!! Love your videos, please keep making them!!!

[@mike-yp1uk]

I watched all the free videos for quit a while. Then i bought his e book. then went premium. I watched videos daily like 3 or 4 a day. This stuff is awesome. If u work on cars you should invest.

[@ralfsautomotive]

That is clearly one of your better videos. Good Job everyone!! 👍🏼👍🏼

[@KStewart-th4sk]

If there are any bad ones, I haven't seen any!

[@elijahcalhassan5084]

this section is awesome. i desire to be part of this class in time to come for some reason. i will be glad to have you as my teacher.

[@ScannerDanner]

Thank you Elijah! Great name btw

[@billarroo1]

U R Good, I'm an old mechanic not used to this electronic stuff, still learning, Great Video, thanks.

[@laohantun7404]

Its a gem lesson guys....I bumped into a lot like that, thanks for sharing.....God bless you guys....

[@waynehutchinson1423]

Excellent ! Excellent ! Excellent ! I learn so much watching your vids.Thank you.Dan

[@fixallman77808]

Loved this. Appreciate what your doing here. It is helping me diagnose a no start/no comm with my Honda CRV, I know from some research that this may have other issues, but at least i can try to further my education. Thanks again. And I will be purchasing your book on this area.

[@ScannerDanner]

I have a Honda Element no com no start (I think) on my Premium Channel that may help you too. Sign up for the 14 day free trial and using the premium search in the drop down menu of the Scanner Danner Premium section and search "Element". Watch it and cancel your subscription if you want. I just think it will help you too. Thank you so much!

[@georgejones7358]

That was an extremely educational class. Thank you ScannerDanner.