Daytime running light circuit troubleshooting (DRL circuit)

[@hewittmharned5198]

The camera work, the running commentary, the inset schematic with highlighting, the completeness of the vid -- probably the best I've seen period! THANK YOU for such an EXCELLENT tool!

[@jcallum8408]

Excellent troubleshooting! This is what separates the men from the boys in our field of work. I've seen alot of "shooting from the hip" and parts changers over the years. Well done!

[@ethanadriel614]

i guess it is kind of off topic but does anyone know a good site to stream new series online?

[@rodrigostetson7188]

@Ethan Adriel I use Flixzone. Just google for it =)

[@kingpest13]

​@@ethanadriel614spam

[@FirstLast-fb7kk]

Grateful to have come across these videos. I was able to diagnose, isolate and repair my non functional drl thanks to your walkthrough it's schematic. It is troubleshooting like this that not only separates the skilled from the novices but also teaches those with the desire and need to learn about their systems.

[@Everstriving]

Excellent, thank you, my wife was experiencing DRL warning lamp on and sliding doors not opening in her Honda Odyssey (youngest daughter jumped into the driver's seat as my wife was filling up with gas). Seeing in this video that there is connection from DRL to parking brake, I suggested to her to see if the parking brake was accidentally on a bit. That fixed the problem...nothing like diagnosing car problems from work over the phone =).

[@jimmysantiago3010]

I been working on my 96 Hoe for sometime now and it is almost impossible to find good video references to repair her, your Videos are FANTASTIC! Thank you for doing such a great job!

[@VERNUCHI688]

I forgot to mention, you were right. My Tahoe had a misfire in cylinder 1. It was the fuel injector. Thank you much. I am subscriber for life.

[@jarinwilson9539]

90% of your tests at the relay...amen brother, haha. This is the reason why I love relays, because at the relay, you can quickly determine...1. how the coil is controlled(ground side switched or power side switched) 2. Bypassing the load terminals(if the circuit now works) you just ruled out the entire load side of the circuit. 3. Current draw can be measure there(load side) and so many other awesome tests, mostly with inexpensive tools anyone can purchase at Sears or some ma and pa hardware store. The fact that your test light was nice and bright at fuse 15 but was dim at the relay is an instant red flag. Obviously there is a voltage drop problem and that problem is between the fuse and the relay, in this case, the diode. Love the work Will, keep it up.

[@jeremiahburns8682]

i just wanted to say thank you for your videos on the day time running lights You help me narrow mine down to the relay switch and now my low beams work again. thank you agin.

[@kaubouy]

Nice. The parking brake had fallen just enough to light the indicators. Pulled it up and the DRL is back in business. Thanks!

[@SteveRobReviews]

Well done!! I recently bought the " load pro" test leads that connect to my DMM and in this situation it would work as you have shown with the push of a button. The test leads checks for opens, short to ground and high resistance all at once. A real time saver have a fantastic addition to my DMM I never remove. If you have never seen the load pro its well worth a review. Looking forward to part 2.

[@leo-z1b8x]

Excellent video - great camera control with added schematics from time to time, excellent instructions on both parts 1 & 2...it helped me diagnose that I had a faulty DLR relay and not the diode. The relay failed after I attempted to update my 1997 K1500 with replacement LED bulbs that were recommended for the vehicle. I'll be calling them tomorrow to see if I can even use the LEDs on my vehicle given what happened. I read some articles after I purchased my bulbs that you should not retrofit halgen based vehicles with LED bulbs as the cans are not designed for LED bulbs and the light does not get directed correctly and/or blinds on coming traffic.

[@robinsonsauto]

Thank you very much for the compliment :) glad the time of editing didn't go unnoticed... these circuits can get pretty tricky. understanding and reviewing the schematic is crucial My hope is some will study this and have a better understanding like you mentioned... you may be on the right track with the guess, im heading to the shop shortly if i have some time i would like look into the noise. thanks again,

[@riverboatman7581]

GREAT video. I have a problem with dim lights at night but haven't started diagnostics yet. This video gave me a lot of info that I'm sure will be useful if my DRL goes out. Sure would like to see a video on diagnostics of dim HB & LB lights at night. My truck is a 1998 GMC Sierra but I've seen a lot of GMC/Chevy trucks running down the road at night with lights that so dim I'm sure they are like me......LOOK out for that deer!!!!!!

[@robinsonsauto]

thanks i appreciate the compliment,I love the challenge that comes with electrical troubleshooting, I like to think its one of my specialty's, i enjoy it... so as long as you guys enjoy the vids i will continue, thanks again

[@DOLRED]

I did not think this would help me until I got to the part where you describe the Diode. Then it hit me!!! The 2002 Chev ZR2 Tracker Diagram I have from web shows a Diode!!! I could not make out the printed symbol (very small on screen and lettering tiny). Now I know. It has to be the Diode because the voltage issue is the same---reduced power. My problem is the interior lights have failed. Now all I have is the challenge of finding the Diode in the vehicle. Thanks much for the detail.

[@johntracey523]

Great job explaining the workings of this circuit and how to troubleshoot it and some of the pitfalls of using a multimeter.

[@robinsonsauto]

Thank you, glad i could share this with you guys. many people have trouble understanding this even other techs i worked with over the years, hopefully this demonstration will help shed some light

[@spelunkerd]

You caught me thinking the question as to why you used a test light to check ground when you could have used a DVOM. Your next sentence showed the voltage drop under the load of your test light, and I felt a little sheepish. I probably would have missed that, and spent hours trying to figure it out. What's the point of that diode anyway?

[@robinsonsauto]

Your welcome, glad i could help its comments like this that keep me motivated :) Hope you enjoyed part 2

[@skillfulpeople]

Superior knowledge of the vehicle´s circuits only comes from a full understanding of electricity, and that´s what I found in your video. Thanks

[@hernandoolarte8801]

Great tutorial on auto electric troubleshooting. Clear and simple, like everything should be. I have tried this website but have message as FORBIDDEN

[@kingpest13]

Awesome video. Really hard to find anything about mid ninety's chevy DRL diag. Which is odd because there are usually several choices to pick from with a OBS

[@spelunkerd]

I'd like to see that device in action -- good idea. The only negative is the fact you need to be careful regarding what voltage gets sent where, though in this case the risks are small.

[@greygoosemafia]

I love this video and your direction on it. How you provide the wire diagram and explain what you're doing and thinking and following along with everything on the diagram.

[@robinsonsauto]

Richard Cowtails thank you bud, man this one is going back awile. glad you enjoyed, I truly enjoy electrical troubleshooting

[@robinsonsauto]

Thank you, im going to check that out Looks like a great setup. Part 2 will be up soon

[@chrisjl84]

Man that is some good controls troubleshooting! Really impressed at how thorough you are!

[@robinsonsauto]

Thank you for the compliment and the feed back its greatly appreciated

[@andrewcarnegie3146]

Robinson I got a question 4 you My 99 Tahoe does not start And the big 40 amp fuse keeps blowing as soon as I turn the key to ignition on!

[@robinsonsauto]

Man that's a huge compliment thank you, i appreciate that

[@chrisstegall9123]

As always one of your videos made troubleshooting a problem very simple.

[@vgbr88]

Your electrical troubleshooting videos are very helpful. All your videos are great. Thanks for sharing.

[@robinsonsauto]

lol glad i could make your day a little better, thank you. That fancy test light is what came out of one of those Saturdays i had nothing better to do lol so i made a stubby test light with a needle point, that was over 5yrs ago one of the best tools in my box ;)

[@shawnfrederickson5775]

Man your awesome!!!!! I have been trying to fix this for days until I watched your very easy to follow video. Thanks sooooooo much!!!👍👍

[@geojor]

excellent information, I have a 2011 GMC Sierra, and will remember this video if/when my daytime running lights are problematic...thank you...

[@adrenalinehigh2070]

Keep up the good work! Your video made my life so much easier. It helped me diagnose an electrical issue in a SAAB. Jeez this was great!

[@robinsonsauto]

:) many many times this misleads people including myself... Most DC live testing I Perform with a test light (With a bulb) just for that reason. An LED test light would show ok and can mislead as well. i should state some circuits are sensitive, so care needs to be taking while using a test light. i should cover that in a future video ... not 100% certain, will look into it though thanks again always look forward to your feedback

[@tboneproductions2453]

Excellent video! Trying to learn electrical, and found this incredibly helpful. Thanx again

[@rudielvs]

That was So thorough.., thank you so much. I'm taking electrical And having a hard time understanding it. But you broke down very well Can't wait for part 2!

[@winger84a]

Thank you so much for taking the time and effort to educate us luddites. No more changing parts and hoping! Couldn't be better.

[@lawrencecarey9198]

You did a great job on Shan how to repair them lights very nice

[@bigjakejsu]

I really enjoyed this video. You have explained everything very well for me to understand. I do not have the exact same problem, but I think it will help me solve my problem. I have one question: If the DRL Relay is not working could it disable Daytime Running Lamps & Low Beams? At the 3:40 mark in your video you said if the headlight switch is on that there is no need for the DRL Module to be working. From the wiring diagram the Lamp Feed travels to Head Lamp Dimmer Switch to the DRL Relay to the Low Beams. If the wires are good and no ground outs, are the two suspect faults the Head Lamp Dimmer Switch and the DRL Relay? Or just the Head Lamp Dimmer Switch? I have a '98 Chevy K1500 with no DRL or Low Beam. High Beams work. Checked fuse 4 & fuse 15. I'm checking the DRL Relay in the morning. I hope it is not the HLD switch. Relays are easy access to replace and less expensive. Thanks again for posting the video!

[@pca9pca9]

Excellent video!!! Now I will apply my new found knowledge and see if I can solve my DRL problem. Thank you so much!

[@robinsonsauto]

Thank you, Im glad this came along and was able to demonstrate

[@cytoproct6250]

Excellent work expert. Thanks so much. Waiting for part 2 please.

[@jeffblair7038]

Here is part 2. kzbin.info/www/bejne/jn6umJmKqNJpqa8

[@billg1871]

Thank you! So grateful you took the time to make this video

[@xonicko1]

Great video. I am curious what the symptoms were that turned out to be a faulty diode? What was not working properly on the truck before the resolution? On my suburban, the daytime headlights work fine during the day. At night when I turn on the light switch, the instrument lights do not turn on, nor to the rear running lights. Weeks ago I checked fuse 15, but until I watched your video, I did not know to also check fuse, which I will do asap. Based on my symptoms do you suspect the DRL circuit ... If not, what should I check first, the diode? Your video is one of the best I have seen. Thanks so much.

[@dereksimenac8844]

best diagnostic video ever how do you get the wire schematic to highlight, some sort of program?

[@moshtakazrah7319]

Thanks for that helpful video. I have 2000 Chevy impala and I don't know where to find the (DRL circuit) thanks a lot.

[@vegansaxon3962]

Hello..thanks for your detailed video here but I am a bit slow with electronics..I have a 93 suburban and am removing the OWL headlights and replacing them with old school round headlights..I don't want the daytime lights..hpw can I wire it so that just the parking lights come on when I flip the top rocker switch...also there is already a problem because sometimes the DRL and parking lights do not even work..I think it's in the switch because if I turn them off and on they will work again...thanks again

[@nathanwelch5835]

Awesome video and really like the electrical explanation.

[@billykaiser7660]

Thanks for the schematic lesson. You saved me.

[@robinsonsauto]

your welcome, thanks for the compliment

[@Fisherman613]

old video but really good one . recently i had one light burn out and so i decided to replace both DTL sockets and i did and know i have no power to either socket . i thought i soldered the wire reversed . DTL fuse under hood checked out good . not sure how i lost power

[@ugo90]

Very very good demonstration. I have been struggling with this very problem on my 2000 Sierra 1500. It started as intermittent but is now chronic. What schematic software are you using? And how can the Ambient Light Sensor be tested ?

[@jameshopper8289]

Hey I really like your videos I have a 1998 GMC Sierra having problems with a headlights when I click the high beams on no lights coming on but relay down on the floor next to the turn signal flasher relay buzzes

[@epiphaknee]

Excellent videos! Your editing is amazing - introducing the pertinent insets when needed! Your discussions are clear, logical and make total sense! I think most struggle with electrical, but your videos will give viewers a "fighting chance." Let's all guess on the clunking noise - ball joints and idler arm? LOL!

[@kb8wlu2661]

What schematic software you using

[@popxkorn81]

Superb video! Thanks. I like that schematic software. What is it if you don't mind? Thanks

[@orgcrew1]

where u get your wire diagram

[@Rick_Dunaway]

Quality information here, good to see. Keep up the good work brother!

[@nicknoneya2604]

Won't let me comment, so I will try here. Where on the diagram is the little bulb on the dash??

[@Rick_Dunaway]

nick Noneya Jump to 4:25 There He talks about it and shows the location of the Day-time running light indicator on the drawing. Labeled (DRL) follow the green line he has it drawn over in dark blue.

[@thomaskerr1019]

great job i have a truck 96 gmc i just put a head light swicth in now i dont have running lights or brake lights n blinkers in the back of truck but have power to the harness i cheak the fuses all good n the bulbs r good im lost now

[@robinstone4041]

Can you please help me find this part on my Chevy Express Van 1500, 2001? They have been flickering and buzzing and now they don't work but affect my dash and starting ability. I'd like to remove the diode and bench test or just leave it out to see it it changes the behavior.

[@bernardwatson4884]

I have the same problem,how do we fix it?

[@technicalitems731]

My 2002 gmc savana had no headlight left except through the DRL! Replaced every bulb, fuse, switch, etc….

[@SuperCarfix]

Saturday eve and I have nothing better to do:(;( But looking at your upload made my day.You are awesome.BTW where did you get that fancy test light?:):) Gan not wait for P2. Thank you

[@robinsonsauto]

Thank you... will be uploading part 2 soon

[@claudianowlin7833]

How can you tell if it's realey or module

[@hmroa3056]

Thank you for your clear explanation. I learned a lot.

[@red2965]

Thanks for this educational vid, looking forward to seeing a follow-up

[@hahasman2669]

I don't have a good ground on my DRL relay at terminal 86,where does that ground originate from?Thanks for your great videos.

[@MrTimesetter]

Very informative tutorial...nicely done. Thanks for posting this.

[@roro560v8]

Very informative video...waiting for part 2

[@mr.lawrence6627]

where did you locate your schematic sheets at. Thanks

[@smileejohnson2655]

I'm checking fuses . I see what you mean with the numbers. Fuses good , my hdlp- hi is out. Lights in front but not in rear . Daytime running lights

[@timtackett82]

Mine won't go out. I have a leak around some glass somewhere and water is getting into the car. When it get's hot there's condensation everywhere. I'm thinking the moisture may likely be the problem. Yeah. I know I have to take care of the water issue, but in the mean time I need to figure out why the headlights won't go off. And realistically, it may not be the day runners. I know I have heard what sounds like a relay trying to switch back and forth and the lights flicker when it does. My first try is to replace the headlight relay which is what brought me here looking for the location of the relay.

[@robinsonsauto]

Thank you, will be uploading soon

[@joestone2068]

Great video Ty I have a2003 Chevy Tahoe and one day the parking lights came on by themselves and I can’t turn them off in less pull the fuses for the taillights or unhook the ground on the battery would you have any idea what might cause this? Thank you in advance.

[@robinsonsauto]

thank you, part 2 cumming shortly

[@chass5438]

Coming ?

[@fire7765]

Great logical diagnostic routine.

[@spelunkerd]

Thanks for the PM, I'll have a look.

[@Rick_Dunaway]

rtoledo2002 Exactly! Problem solving as a general skill is not common knowledge to most. And it is not being taught to the public in any significant magnitude that I am aware of! You just don’t know how much you don’t know, so understanding that is critical. A drawing or other technical document gets you closer to a solution. Even if you don’t understand what something is or what it does, at least you know now those things are present and should be tested or accounted for. There is much freedom to be found with the recognition of “I don’t know” if answers/information is then sought out. This builds confidence and self worth/value and empowers the individual to grow more... ♾💡🌈

[@bartscave]

What computer program highlights the wires on the wiring diagram for you when you scroll over it?

[@cengeb]

camera is great too, crystal CLEAR!

[@SurferJoe46]

Everybody wants theirs off... I want to get mine running. Where is this diode for my 2000 Astro Van? It's not where you located yours. I thought I had it fixed... but nope. I DID fix the high speed blower though.

[@TRcustomengineering]

Great video! I can't wait for the next one.

[@04DynaGlyde]

On my 2002 Silverado I'm installing all LED bulbs in the truck. I upgraded the stock flasher relay module under the dash with a new one to keep the LED's from hyper flashing. So today on the driver left side I put in the new turn signal LED bulbs with resistors for the higher lumen 3157 flashing rear bulb, and one 3157 bulb for the front. As well one front side mini flashing LED bulb that is lower lumens without a resistor. This was on the left/driver side of my truck. When I tested the left side, the turn signal in the back and both front signals were flashing. Then the mini flashing LED bulb stopped working. So I swapped it with a different mini LED bulb, and nothing, no flashing. I even tried a resistor on it, and nothing So I took the resistor and mini LED out of the left light socket and put back in the stock incandescent bulb, and it still wouldn't work. Now what is happening is the front 3157 & back 3157 largef turn signal bulbs that should flash. They just stay illuminated even though the left turn signal is not turned on. What could this be, because at first the front mini LED flashing turn signal along with the two 3157 bulbs front and back were all flashing fine. With that said before I installed all the bulbs, I did clean all the light bulb sockets with fast drying electrical spray/protectant. Though non of the other LED light bulbs had a problem. I thought about buying and splicing new mini light bulb sockets on the front. Then it got dark so I couldn't do anything else. And I don't believe it's a blown fuse or the front and back turn indicators wouldn't just stay illuminated. I'm totally stumped on what to do, could you please help me, thank you. ~Carl

[@04DynaGlyde]

I fixed it, you have to pay careful attention to which direction you put the upgraded LED Bulbs and relays in the turn light indicator sockets. Boy it was time consuming!!!

[@gargato1970]

Excellent video very well explained thank you!

[@flakdawg]

Very good explanation. TY sir.

[@claudianowlin7833]

Man my lights just stopped working in caddlic don't have tools to check things like you do

[@HowardAssets]

Where is the link to part 2 please...this is my battle.

[@1947froggy]

Installed sylvania leds and new sockets in my 02 suburban, having trouble "seeing" then light as the parking brake kills them. Idea to just set car up so they light/or not? THX

[@mohad1601]

Thank you for good lesson and valuable information

[@georgehuling1567]

Thanks I wanted to turn lights off when starting the truck

[@tommycat2009]

Did you make the part 2 video? I am trying to locate the module.

[@R3lentless05]

We did removed the drl module to thinking it would fix our issue. The lights turn on on the switch but when I place the car in start position they won't come on....My Dad seems to think it's has something to do with the brake switch but we can not figure out how to bypass the emergency brake. Any help would be great!

[@andreashandl8647]

*****

[@mattkimball4253]

Andreas Handl cb

[@Glub_juggs]

I have a 2000 GMC Savana 3500. The rear running lights won’t stay on for some reason. I hear a loud click then they turn on then I hear a loud click again and they turn off? Any ideas on what it might be guys? Ground? If it was a fuse the rear running lights probably would work intermittently. ?

[@lancehohimer7569]

So what happens if the relay ground is no good? Where do I look from there? I have DRLs but no low beams with swith on. Have high beams, just no low beams. I have replaced the brake light swith, turn signal switch and headlight switch and DRL relay. Checked for continuity at diode. But the ground side of the relay is no good.

[@rafe6909]

did you ever figure this out? my ground is also no good

[@toddadams1246]

do you know where the drl module is on a 2000 silverado 2500?? you seem to be the only person that has any kind of since on here... thanks. Todd

[@Thomas-fo4dv]

Where did you get this wiring schematic? Very high quality.

[@darrellmcclure1480]

My GMC Sierra low beam lights sometimes come on and sometimes they don't. When they do come. on I hear a buzzing sound on passengers side . Any ideas?

[@mattkimball4253]

Thom

[@hp11208]

good vid and info as always.

[@kevindavis4709]

Are you saying if I bypass the light sensor I won't have too unhook my battery cable so my dash lights will go off?

[@crossingthemountain]

Awesome video learned alot!

[@GreenMountainGoldTrap]

Thanks! Is there an online site with all makes and models that you use for the interactive wiring diagram as seen in this video?

[@robinsonsauto]

Your welcome