Compressor is not getting power.

Topic: Compressor is not getting power. (Read 4773 times) previous topic - next topic

Compressor is not getting power.

Reply #15 – May 03, 2013, 08:48:26 PM

Anybody know where I can get a schematic on the A/C system? My Haynes manual doesn't have it and I can't ever seem to find jcassity's information. 1986 Cougar w/5.0 engine. Thanks!

Compressor is not getting power.

Reply #16 – May 04, 2013, 01:00:21 AM

This info will help me get you the correct diagram for your ground.
Was this car always a 5.0? If not what was it?
Does it have an electronic instrument cluster?
Does it have ATC (Automatic Temperature Control)?

Compressor is not getting power.

Reply #17 – May 04, 2013, 02:26:42 PM

Quote from: softtouch;414449

This info will help me get you the correct diagram for your ground.
Was this car always a 5.0? If not what was it?
Does it have an electronic instrument cluster?
Does it have ATC (Automatic Temperature Control)?

Yes, always 5.0 but now HO.
Yes, electronic instrument cluster...but not for long.
No, I don't think so.

"Thank You!" for any assistance!

Compressor is not getting power.

Reply #18 – May 04, 2013, 04:13:16 PM

OK here is the DEAL the compressor gets BATTERY from the CCOT SWITCH and ground from the engine. Get out a test light and check it. If the ground is not there cut the wire and put it under a mounting bolt for the compressor DUN FINISHED
Possible causes

1 magnetic pull in coil OPEN

2 NO GROUND. Hard to believe

3 NO BATTERY different trouble completely

What is the problem and did you check it yourself. I find it fascinating that a ground would be missing. BUT IT HAS TO BE CHECKED

Compressor is not getting power.

Reply #19 – May 04, 2013, 07:36:00 PM

Ground G902 is in the center of the dash.
Ground 902 diagram. All the stuff on this diagram use the same ground. Check and see if the other stuff works.
Connector C305 is a gray one wire connector "near the LH front shock tower". (black wire)

Compressor is not getting power.

Reply #20 – May 04, 2013, 07:55:20 PM

The rest of the picture. To answer your earlier question, yes you can ground the solid black (no yellow stripe) wire at the compressor clutch to see if that cures your problem.
Notice G902 is needed for the blower to run.

Compressor is not getting power.

Reply #21 – May 04, 2013, 10:07:26 PM

Just a point if i may!!!! Did he not post in another area that his clock is working PERFECTLY. You can push me over with a FEATHER!!!!!

Simple test 10 dollar test light and 2 seconds of work from the guy that had a LEMON IROC

Quote Originally Posted by CoogarXR View Post
All you do is hold down the "time" button, and use the two little buttons above the display for the hours and minutes. Every one I have had, you have to push unusually hard on the buttons to get them to respond.

QUOTE from 86
That worked! I set the date and time. Thanks!

His Clock Works . Any other things we need to know... Same ground so at this point going further is useless untill some trouble shooting is DUN. I personally do not like chasing BALLOONS!!!

POINT BLANK 86 DID YOU CHECK THE BATTERY FEED AND THE GROUND AT THE COMPRESSOR

1 YES
2 NO

Pick one ?????

HINT DOES YOUR WASHER PUMP WORK???

You Know Chuck W made a very valid point with another post. He posted great trouble shooting info for a guy that totally ignored him. He was right in his answer. Thanks Chuck you point was well taken!!

And SOFTTOUCH posted a print for you to follow. Now it is time to do some testing or sweat your butt off this summer.

Compressor is not getting power.

Reply #22 – May 04, 2013, 11:07:26 PM

I'm with Tom, G902 is a major ground, and major grounds don't just go bad. If there IS a ground problem, it's probably with the wiring in between. Never seen a clutch lose ground, though. If I'd bet a buck, I'd bet twenty that there's a power problem with a connector that got forgotten.

Compressor is not getting power.

Reply #23 – May 04, 2013, 11:08:11 PM

TFYK, I apologize for taking so long to get back with you. I was under my car pulling the rear axle out. I took the car to Firestone the other day and the guy their said it was not getting a ground. So, I called my buddy Jimmi (being my A/C worked before he switched engines). Jimmi said it has a ground and is getting no power. That's when I asked for a schematic for trouble shooting. Yes Tom, the washer pump works. Remember, I said that I was wondering if it had something to do with the EEC? Well, we have a:
C3W
F3ZF-12A650-FA
EEC-1V
SFI-MA12A

So what Jimmi said he needs to do is see if he left off the one wire and he said something about buying a relay for it. I'm not working the issue because I have already paid him to do it when he put the engine in. I'm just trying to make sure he has the correct schematic. By the way Softtouch, Thank you so much for the schematics. I could not find them anywhere. TFYK, you are correct about the problem being power. Jimmi will probably work the issue on Monday. Tomorrow or Monday I will be sweating my a$$ off putting the 3.45 axle in (lol). Summer is coming! Lemon IROC...I must have hit a nerve.

Compressor is not getting power.

Reply #24 – May 05, 2013, 05:46:17 AM

Well the lemon IROC is not the only nerve HIT. Basically your scatter type trouble shooting technique clearly does not work. I know people need help with issues and i am the first to help along with others on this site from all posters not just me. Wanted to make that clear. Great info on this site from all the posters. But when a person that is calling himself or a friend a mechanic cant tell the difference between a missing ground or battery connection is why your IROC was a LEMON. I am willing to bet you also hit a nerve with that Chevy dealer with BOGUS ISSUES!!

With that once again

1 Does the compressor connector have a ground on it?
2 Does i have battery when the AC is turned on?

Pick one it is a 50/50 shot not to bad considering you are now pulling the DIFF to most likely solve AN AC ISSUE. This is the type of trouble shooting i am getting from your posts.

Also did you check the operation of the WOT RELAY. That is another thing you can RIP in to wildly. Did you jump the CCOT? Or have you ripped that apart lately . Just a thought!!!

So with that i will HUG MY GTA and tell it it is not a LEMON

Sorry and Thank you!!!

Found problem

Reply #25 – May 05, 2013, 09:04:42 AM

During the MANY major and minor swaps to finish this cat I lost the A/C power. Have determined that it is the WOT A/C cut relay, either bad or a missed/cut/incorrectly placed wire at the 60 pin.

Compressor is not getting power.

Reply #26 – May 05, 2013, 09:58:46 AM

It's always great to know the problem.

For me, problems with the car really don't bother me....it's the "not knowing" what the problem is that kills me. Glad to hear you're getting it done.

Compressor is not getting power.

Reply #27 – May 05, 2013, 10:15:51 AM

True Vinny but not checking things that posters take their time and effort to help is IGNORED is something i have little patients for. We have a new guy in the shop and a 6.5 GM diesel came in that this guy worked on last week for an oil leak. He told the customer the VC were leaking. With that we fixed it. BUT!!!!! A week later it had the same issue. I gave it back to joe to find out why. He explained it was the oil pan gasket. I asked him to check it out again. With that he ignored me and that pissed me off. So I racked the vehicle and found one of the radiator oil cooling lines had a rub through. THAT PISSED ME OFF. Not because Joe made a mistake but he ignored my orders. STRIKE ONE FOR JOSEPH!!

WAC Pin 54 Check it and go from there. It feeds the WOT relay coil!!!

EEC relay supplies battery to the WOT relay. Ground from pin 54 completed the pull in coil to close the contacts. Jump it out and see if it works .If so leave it that way. But knowing this car the wiring is most likely messed up. Just a GUESS ON MY PART.

Compressor is not getting power.

Reply #28 – May 05, 2013, 01:20:40 PM

In respect for this forum, I have decided to delete this post. My apology to anyone it may have offended.

Compressor is not getting power.

Reply #29 – May 05, 2013, 09:39:44 PM

Will Do 86!!!

Now fix that dam compressor issue.