Checking The Wiring On The Air Conditioning Compressor

This is just to check the wiring on the air conditioning unit to make sure it was working properly.

[@markhanson8366]

Excellent diagnostic! A fast way to isolate 'issue's with the control valves. Many thanks!

[@Anonymous-it5jw]

It would've helped more if you had shown the control valve and tested it on camera. Thanks for making this video.

[@captainobvious2062]

Ikr I'm trying to figure my shit out and I had no idea where he pulled that damn plug from😡

[@zichragland8880]

@@captainobvious2062 Same here, first time I've had an issue with the camera being too close. Have no idea which wire that was and where it connects.

[@btx5740]

This guy did the some thing to my car today Just a wiring harness

[@keepitreal4387]

Thank you for making this video it helped me fix my AC issues 👍

[@robertmullen2480]

Very good explanation and thorough as all your videos are excellent thanks

[@togodbetheglory9725]

my friend when you say the control valve you mean the high presure switch or low presure switch?

[@peterroessler6100]

thanks for that a/c clutch video circuit testing.

[@DunDun2212]

Turning AC on and off like that is definitely not a good idea for the system. I'm a AC tech and I know your only doing this to show people what happens, but you definitely don't want to keep turning it on and off like that. It will damage the compressor after time. Also info for the people If you are using your heat in the car you don't want that AC button turned on. It is just running your compressor and wasting gas and also the lifespan of your compressor. I noticed my family members were not aware of this and I explained it to them and now they get it. When you turn your heat on it is a separate unit from the AC. It uses the same blower fan but the heat itself comes from the radiator coolant that runs through the engine. So if your using the heat always make sure that the little button for the AC is off. If anyone has any questions I'm glad to answer. Good vid tho bud.

[@tahseenali2149]

hi mr, i have kia cerato when i have problem in my ac system when i disconnect the compressor and turning ac on and check the electronic voltage it found 12 and after 1 hour or half it lose , what you think in this case

[@fakiirification]

AC is used with heat all the time in the winter to defog windows. No harm. Compressors are pretty robust and simple devices mechanically. As long as your oil and refrigerant charge is correct, you can do very little harm to the system by running it.

[@geeess958]

@@fakiirification I don't believe the commentor above is actually an AC tech, at least not for cars. I have yet to see anyone detail why they believe running the heat or AC burns gas, other than having the car running.

[@morrisw7227]

@@geeess958 Operating the AC requires the engine to turn the compressor adding some "drag" on the engine. Without the AC on, the compressor pulley spins freely. The alternator, power steering pump and anything else requiring engine power to operate produce "drag" on the engine. Any power not directed to the drive wheels would be considered detrimental to fuel economy. Test have show these to be insignificant in real life but technically true. The heater, without AC compressor running, requires no engine power not already in use. Not an auto engineer, just a old hotrodder.

[@geeess958]

@@morrisw7227 definately a sensible explaination. Just wanted to see if anyone knew. Thanks.

[@Larry342516]

If you are not getting power with this test then what would be the problem?

[@estlhm805]

Excellent video and information!

[@Kaibil66]

great video, thank you for your valuable tutorial.

[@Crabchann]

So my compressor works and when I use a paper clip where the relay is, it blows cold air. The relay works fine because it uses the same relay as the fuel pump and I check both relays on the fuel pump to come to that conclusion. Idk what’s wrong with my ac system but the clutch won’t engage when I turn on the ac .

[@joecritch143]

What control valve are you talking about?

[@issamadam9352]

Thank you for posting this tip

[@louis4679]

RomanAutomotive thanks for the vid man, please tell me if you have a vid where you troubleshoot the pressure switch of the auto a/c (the one located on the a/c pipes) OR where on KZbin can I go main? (P.s. you can make a vid series about it from start to finnish if it is a huge job to troubleshoot and fix and sell some stuff in the process, you know?) Anyway let me know, cheers!!!

[@Kevinintheback]

To the people watching, don't use a test light. Use a multi meter. If you dont know what you are doing, you can smoke a computer with a test light. You won't do that with a DVOM.

[@yabasvlog3439]

Great work

[@TeddyD802]

What do you mean by control valve? Is that off the low pressure side sensor or is that the plug off the ac clutch?

[@Tommygun4700]

Ted D did u ever find out?

[@rroopnar]

2007 through 2011 Camrys use a variable displacement AC compressor. Only two wires go to it, which attach to the pressure control valve. This compressor does not have an AC clutch

[@bobbyacosta3502]

Thanks I'll take a look at it

[@issamadam9352]

Do you mean that you have to put the correct amount of freon first in the system and then check AC control wiring?

[@ryanjames5799]

I replaced my ac system, I vacuumed the system but how to add pressure back into system...the clutch won't engage. In your video you said the compressor won't engage without any pressure in the system...so how do I add pressure to the new system? Thanks I appreciate your video, very helpful.

[@caszcollins4616]

Lol its been 2 months but in case you are still wondering all you have left to do is recharge your AC hence " pressurize" the system recharge with r134 refrigerant found at local walmart..como??

[@garyclemons1129]

wow that's all I got to say is wow he's learning

[@RomanAutomotive]

Who do you work for? Snap On? Why would you subscribe to someone you don't like?

[@neilwilliams8608]

I wish I knew 1/2 as much as you do. To me, you are a genius. I have a 2006 Impala 3.9. All fuses and relays are good. I tested the wire harness going to the a/c compressor with the key to the on position and running. I used a continuity tester and volt meter(multi functional) and did not get any voltage reading at all!? The a/c compressor has 2 wires. Did I do something wrong or, should I have set the multi meter to something else besides voltage reading? Please help! Awesome video. Thanks so much.

[@wyattclark8313]

Did you ever figure this out?

[@mikeymiranda859]

I have the same issue..

[@urke7555]

Same issue here no power to ac compressor valve.

[@Fanzo463]

How to trace the cable to the AC compressor? My second hand car has a damaged plug on the compressor and I don't know the cable that's supposed to bring power to the compressor. Please help me. I have a 2009 fiesta 1.6 litre

[@100bml]

so are you saying the problem was the expansion valve ?

[@tonyinfinity]

Why would the black wire be power? Black is always ground on cars.

[@automedic9781]

SUPERNOVA Not true at all. This is USUALLY the case, but I have in fact seen black wires that are on the power side of the circuit

[@antoniomancini1794]

Thank you for this information, it is very helpful appreciate the video.

[@yolandasirri2012]

I thought you just checked the control valve switch and it was good . now I'm lost😏

[@MAKOMERE]

Yolanda I cherish you

[@ziaulhassan472]

hi wonderful lecture thank you

[@johnnydimayuga2791]

thank you sir Very good explanation,,,,,,,,

[@Hever73]

So what is the control valve and what does it do? Thanks

[@jahvariforrest8940]

My compressor stays on once the car is started. What is the cause?

[@ahmadsheikh5364]

There is no way that the black wire is positive and white is negative... you have a wiring harness reversed

[@lafrancois6323]

Somethings not right 😅

[@ArturoGarzaID]

The wiring harness that connects to the compressor doesn’t have continuity on my car and we checked to see if it has power with the car and ac on and it doesn’t. So it seems the compressor isn’t getting power, but I don’t know where that harness connects to. Would you know? Is it somewhere near the fuse box? I checked all the fuses, they look fine.

[@nelwindomingo7331]

Same problem with my accent 2017,no power going to compressor,i cant fibd any relays

[@osmanitellez9729]

@Nelwin Domingo. Did you solve your AC problem? I also have an accent 2017 trying to diagnose. Wondering if you have sone tips.

[@Abdullah-hc1cz]

my car always send voltage to magnet clucth,i already disconnect fuse and relay..still have voltage going to magnet clucth,questions.. what is the problem?

[@blatt5478]

Hallo, my skoda tfsi 08 comes with an air conditioning compressor only 4.5 volts. what can be the cause?

[@bigjig1o1]

Roman I have a fuse that blows soon as I turned on the ac any suggestions are grately appreciated

[@101whoisthis]

Jiggamane if the fuse blows there is a short somewhere on your wiring

[@thersten]

I have the same High End Snap-On Multimeter.

[@vtecdestroyer5653]

Is it the compressor wire?

[@johnnyharper9885]

how do u get your ac working with a kill switch

[@mujnabeenkhan6102]

My car vw polo 2004 12v is coming Compressor souket what is the problam Control penal ect

[@juicyj2295]

Great job

[@trini_boi2414]

My problem there's no power going to the ac compressor..I did checked the fuse and it's good I just don't know what it is

[@ronijr4918]

Did you find the problem?

[@trini_boi2414]

@@ronijr4918 yes I did and I learned something new..if there's no freeon in the compressor there would be no power going to the compressor I guess it's a safety feature to keep from burning up your compressor and I sure didn't know that..my mechanic just connect the hose to the AC system I crank my car with the AC on high and as soon an the compressor got the freeon the switch kicked on to send power to the compressor simple as that..

[@CHIBA280CRV]

Could it be just a bad clutch ?

[@boomstickkid]

still should of checked the clutch itself. ive replaced a few bad clutches on the front of the compressor. i dont know if this replaceable or not

[@RomanAutomotive]

There is no clutch.

[@dave1135]

+RomanAutomotive every a/c compressor I've worked on has a clutch. need to check the AC compressor relay for power and jumper it to make sure the compressor kicks on

[@boomstickkid]

yes i was about to say. it HAS to have a clutch. theres no way it doesnt.the wire youre testing must go to the electro -magnet clutch dealio on the front of the compressor? or???

[@KLX1990]

they've had clutchless compressors since the mid 80's. google search clutchless variable displacement a/c compressor. Actually don't, your head might explode

[@boomstickkid]

sure "developed" in 1985, sanden didnt actually make any until 2003. also RIDDLED with failures. sound like great compressors. is that why you didnt want me to google them? ive worked on my fair share of vehicles. never seen a "clutchless" design. unless im too stupid to see what im looking at. almost all the ones ive seen have 2 wires going to the front of the compressor "CLUTCH" it still needs some way to engage/disengage. either internal or external. who gives a fuck. get off your high horse.

[@Jefferson66019]

I am wiring up my Sure Fit A/C from Vintage air in my old 64 Chevy C10 pickup. Any idea what gauge wire for the compressor and ground? Instructions address where to connect everything but nothing on the diameter...If anybody knows please let me know Thanks...Jeff

[@carlosbanegas7577]

thank you very moch

[@marshallbritt7184]

Thanks. For. Info. My. 200 ranger. Clutch. Has. 2. Wires. Going to it. Black. Striped. Poss. Green. White. Which. Is. Hot

[@marcknieves6161]

I have no power coming to the plug 🔌

[@EugeneMamitwa-mn9ux]

Useful

[@Jcruce7122]

hey bro I got a 2002 GMC Tahoe have to jump relay with a ground and I have cold ac any help ?????

[@KillaCaff1]

You have bad switch

[@emmawatchman7583]

What if there's no power at the plug in to AC

[@RaymondRBH]

same question

[@rocknral]

No refrigerant, blown fuse, pressure switch failure, broken wire......

[@pollydor07]

THANKS

[@Banshee365]

That doesn't look like a compressor connector. That looks like a idle-up air valve connector. Where did it unplug from and what model car is that on?

[@RomanAutomotive]

That is the connector for the ac control valve. The ac compressor is a clutchless compressor.

[@mujnabeenkhan6102]

12v is coming but 5a fues ok

[@savu_edits.]

Hyundai Centro Car Mime Lever is a compression off

[@bigeasyarts8415]

What if the wiring is bad?

[@crpth1]

Repair/replace as needed. ;-)

[@bulmang1432]

My problem is wiring ,that no current (positive) HOW SHOULD I FIX IT PLZZ

[@cookierepairprojects4544]

find the relay and check power there

[@nelwindomingo7331]

I have dtge same problem,but there is no relay in my accent 2017.

[@viswanathan7430]

Blower wire no supply ya

[@feedbrain6257]

Hi, please how to test with control valve that got 4 connectors instead of 2? thx

[@joshuacaleb9012]

Shoot i have a 3 wire

[@abbaschoudhary9251]

Sir hello we need information 2016 Camry compaser

[@aminkhan1999]

/

[@vista806]

Well that was a waste of my time.

[@MrOmerta]

Thanks gonna attempt to figure mine out this weekend so can finally get my ac just started to hit 90s today here.

[@kicoo258]

Hello, I have a question My air conditioner doesn't work and I took it to the mechanic to fill it up and check what's wrong with it I came and charged it and it didn't work and found that there was no voltage on the compressor and the fan and the fuses and each component was tested by itself outside the car after it was taken apart and it worked.. What could be the problem? The question is Opel astra h 2006 1.7cdti

[@luispalomino5514]

Thank you for your recomendations!👍

[@Gancycle]

Your what I needed on my search. Nice job well explained

[@chavezmartina34]

On the wire still has power even if the car off so clutch on the AC locks up I try to move it when it's off

[@micthegreasemonkey2918]

Hay buddy great vid.. so if i hav no gas in my ac system i wont see 12v @ the plug when the ignition is on car running?

[@salvadorlucero1575]

I want to know the answer to this question as well

[@rocknral]

I know it's a bit late, but for those still wondering... No, if you have no gas, the pressure switch will override the electrical signal to the compressor so it won't pump.

[@morrisw7227]

THERE'S NO "CONTROL VALVE" !!!!!

[@rroopnar]

The car that he's repairing has a variable displacement AC compressor. The only electrical connection going to it is for a control valve that determines how much it's compressing.

[@tahseenali2149]

hi mr, i have kia cerato when i have problem in my ac system when i disconnect the compressor and turning ac on and check the electronic voltage it found 12 and after 1 hour or half it lose , what you think in this case

[@shareefsk290]

Ford Fiesta 2008 model regulator fan AC power supply not working anything problem tell me

[@harryjones2420]

does that wire just hang in the air, not plugged in to anything

[@disgustinghandsome1282]

Was that your wife helping you out or someone else you annoyed by?

[@josearellano3268]

So black is not ground..??

[@blackholeofeternity7908]

4:39 replay over and over smh... 🤦

[@alenmihelcic8267]

yeah,mechanic ar tief,but you with lamp are expert. Come work to me.haha

[@FredzDeadBaby]

My 05 gmc sierra Has no power to compressor has ground, new relay, fuse is good and also has no power to pressure switch, but has power to cycling switch. I have checked all of GM tech bulletins and nothing . I checked fuses and the in-cab dial but for some reason no power on compressor any advice

[@savagelife9199]

Do you see your ac compressor outer pulley plate spin or hear it turn on when you turn your ac on

[@FredzDeadBaby]

It did at one point ,now im thinking bc of my father in law jumping the lower pressure sensor so often that it has to do with the wiring harness I put my multimeter on it truck running ac full blast was only 4volts and the high pressure harness didn't show anything unless its the switches in cab

[@crpth1]

Yeesss Sirrr - The relay it's new, but is it being feed with power? Either yes or no it's a point from where you can start to work on.

[@valisapps1254]

My civic a/c is not working, fans work, but a/c clutch is not engaging, I've bought one of those cans because I thought it was low on refrigerant, but when i connected the valve the pressure is too high, it's in the red zone, what could be the problem?. My a/c had been working just fine until a few days ago that the temperature was at around 110 degrees.

[@ruigooal]

You probably need to take your car to a mechanic to have him fix the pressure. The computer will shut the AC system to protect the components from getting damaged when there is issues with the pressure I believe.

[@Masterahsoka]

Maybe the control valve wiring is faulty?

[@Masterahsoka]

Valisapps Happened to mine, the connector was rusting and broke.

[@kantilalrathod893]

Waringh caplet

[@yanikaghate4622]

800 car Ac me wiring ka video bno sir Ji

[@greygoosemafia]

whats a good test light to get?

[@greygoosemafia]

Thank you. I was looking at the otc Amazon. What do you think? The heavy duty

[@RomanAutomotive]

Richard Cowtails Matco doesn't make it, so it is probably an otc.

[@zeke112964]

One that works

[@greygoosemafia]

@@zeke112964 otc

[@zeke112964]

@@greygoosemafia Walmart, Home Depot , Lowes, Kmart doesn't matter

[@mr.stunts7393]

can anyone help me i replaced 30 amp fuse and blower motor now fan runs and it doesn't even have keys in the ignition

[@bobbypickle67]

Mr.Stunts lucky you, I don't even know which fuses are for the a/c or heater. both the box and side panel fuse boxes the diagrams are unreadable. And all I find on the net only tell you where the fuse panels are located and that it. I have an 08 impala 3.9

[@sxmost]

While the video is goo, I am confused as what being tested. Was this demo for electric leads to the clutch?