A/C circut Question

1159 Views 4 Replies 3 Participants Last post by 93eldodave, May 23, 2009

93eldodave

Discussion Starter · May 11, 2009

I have a 93 eldorado touring and A/C is not working and some one has cut and bypassed (Hotwired compressor) to make it work, I have since made all repairs to this mess and and have come to the conclusion the problem is inside the car..I can ground green/White stripe wire in car by Pcm and A/C works.. Does the PCM controle the A/C or does the body controle mod? and where is the body controle mod located(What will it look like and size)And i have also tried resetting The pcm with a tip i found somewhere else that involved pressing auto and temp together to clear codes but that diddn't work(may not have done it right)? any help ? :banghead::banghead::banghead:

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carnut

· #2 · May 14, 2009

The computer provides a ground to turn on sensors and compressors as you have found out by grounding this wire. Do a google for anthonywhaukap and click on cadillac at the top of his web page regarding entering diagnostics. I think theres an A/C code held in the ECM that needs erased to enable a ground circuit thru the ECM.

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jasu01

· #3 · May 16, 2009

I have a 1995 Cadillac & the A/C works great sometimes, then it just quits cooling, then it may come back & start cooling later, anyone have the same problem?

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carnut

· #4 · May 17, 2009

Refer to answer above your post referring to that web site and pull the fault codes if any. Post back but post as a new thread please.

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93eldodave

Discussion Starter · #5 · May 23, 2009

carnut said:
The computer provides a ground to turn on sensors and compressors as you have found out by grounding this wire. Do a google for anthonywhaukap and click on cadillac at the top of his web page regarding entering diagnostics. I think theres an A/C code held in the ECM that needs erased to enable a ground circuit thru the ECM.

I had striped the interior out to have carpet shampooed and had the pcm out and when i put it back in to move car around the ac started working so i must just have a bad connection at the pcm? i claened the plug connections with some electrial cleaner and am hoping for the best..:welcome::welcome:

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