AC no power to Clutch Coil - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-02-2006, 11:05 AM   #11
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Quote:
Originally Posted by cjpenny89
I was just thinking about grounding out that wire that is great but when you ground out the relay will this send a ground to the compressor clutch or will it send 12 volts to it?

I know there is no volts what so ever going to the clutch. I can take power from the battery and hook up ground and power and it locks up the clutch.
if you put that wire to ground, the relay completes the clutch circuit to ground. Maybe you don't have 12v at the relay? I don't have the fsm in front of me so can't tell you which wire is 12v. you should be able to probe all wires and at least one should be 12v.
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Old 06-02-2006, 11:12 AM   #12
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Ok any help will be great I will go through and check all these again and ground it out just incase I missed it.
with Key in the run position engine off I get power for everyhing except the clutch. I heard the power goes out of the cycle switch somewhere then to the clutch?

I am sure I don't have 12 volts to the clutch. I will also do it the other way if it has ground then I will hook power to the power side of the clutch and that will also tell me if the relay is completing the ground.

Maybe I need to track down the power wire from the relay to the clutch.
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Old 06-02-2006, 11:23 AM   #13
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Quote:
Originally Posted by cjpenny89
Ok any help will be great I will go through and check all these again and ground it out just incase I missed it.
with Key in the run position engine off I get power for everyhing except the clutch. I heard the power goes out of the cycle switch somewhere then to the clutch?

I am sure I don't have 12 volts to the clutch. I will also do it the other way if it has ground then I will hook power to the power side of the clutch and that will also tell me if the relay is completing the ground.

Maybe I need to track down the power wire from the relay to the clutch.
you won't have 12v at the clutch until the green/white is put to ground. power (12v)does not go through the cycle switch. this is used in the pcm input part of the request for compressor.
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Old 06-02-2006, 11:39 AM   #14
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Man this is so much better info then what I have been doing over at the auto ac forumn.

Is there a list of things you want me to check out before I get back with you again?

They were having me jumper the cycle switch to power up the system and this did work it gave me power to every thing except the clutch coil.

I will check the gorunds all my test were done with the jumper in the cycle switch.

Thanks for all the help
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Old 06-02-2006, 11:47 AM   #15
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Quote:
Originally Posted by cjpenny89
Man this is so much better info then what I have been doing over at the auto ac forumn.

Is there a list of things you want me to check out before I get back with you again?

They were having me jumper the cycle switch to power up the system and this did work it gave me power to every thing except the clutch coil.

I will check the gorunds all my test were done with the jumper in the cycle switch.

Thanks for all the help
if you are jumpering the cycle switch, grounding g/w wire will engage the clutch. if not, you are missing 12v somewhere from the relay to the compressor(straight connection). (or even ground at the compressor) (or the compressor clutch is bad - if you have 12v in the above scenerio)
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Old 06-02-2006, 11:51 AM   #16
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will do tonight or tomorrow and report back thanks a bunch!
Chad
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Old 06-05-2006, 07:53 AM   #17
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Ok I looked at the relay center on the firewall and there was no green/white wire going to any of the relays.
In the first relay 1 or 2 realys there were some green wires with different color tracers and a solid green.

what next?
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Old 07-25-2006, 02:57 AM   #18
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i am a little confused as well. i am thinking they are describing the position of the relay for a 1997 SSE, not a 1992 SE or a 1993 SE like what I have. I am stuck on this problem...


On a 1993 Se, where is the compressor clutch relay??? thanks.
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Old 08-05-2006, 02:17 AM   #19
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The reason your compressor is not running is because of a low pressure sensor on the high side system. When there is not enough coolant in the system, the sensor cuts power to the compressor to prevent damage.....Ironically this doesn't help when you know you don't have enough and are trying to put more in

THE SOLUTION TO THIS PROBLEM IS EXTREMELY SIMPLE

Disconnect the negative battery terminal for 1 minute. This clears the memory in the ECM. Reconnect your battery.

Next, get your coolant/hose and everything ready and hooked up.

Turn on your car and turn the A/C on max. Your compressor will cycle on and you can now recharge your A/C.
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