AC Compressor Electrical Overview
06-15-2005, 10:44 AM
#1
AC Compressor Electrical Overview
My AC Compressor isn't working, and I think its something electrical in the engine bay. When I've had a belt shread I think I damaged some wiring. Can someone explain how the compressor is wired?
Thanks.
Thanks.
06-15-2005, 12:09 PM
#2
Member who somehow became The President of The SE-L Club
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You have to have a charge of R-134 in order to make the compressor clutch turn on.
Either buy a recharge kit with a gauge and follow the directions or have it serviced by a qualified A/C tech.
Either buy a recharge kit with a gauge and follow the directions or have it serviced by a qualified A/C tech.
06-25-2005, 01:10 PM
#3
I just got around to this. I bought a recharge kit, and when I attached the guage to the low side port (car running, AC on max) I get 100psi, which is in the "warning-high" level on the guage, but I don't see any reference to a PSI number in my manuals.
Do you still think its r-134 related?
Do you still think its r-134 related?
06-25-2005, 01:55 PM
#4
I just read up in my haynes manual. It suggested that I remove the AC pressure sensor connector and create a jumper on that connecter to see if the clutch engaged. There are 4 wires on the connector, 2 black, 1 green and 1 green w/red. I jumped the green and green/red. Still nothing from the clutch.
There is also only 1 electrical connection to the compressor that I can find, a black wire running down from the same connector that goes to the alternator. I turned the AC on and check its voltage, and its a big ZERO (assuming that the compressor housing is grounded).
The fuse for the AC system is still good. I don't know that I'm checking all the electrical connections right, as I'm not an electronics expert.
There is also only 1 electrical connection to the compressor that I can find, a black wire running down from the same connector that goes to the alternator. I turned the AC on and check its voltage, and its a big ZERO (assuming that the compressor housing is grounded).
The fuse for the AC system is still good. I don't know that I'm checking all the electrical connections right, as I'm not an electronics expert.
06-25-2005, 04:58 PM
#5
Member who somehow became The President of The SE-L Club
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There is a low pressure switch or sensor. Your 100 PSI reading indicates the compressor is not running, it will be around 30 if the system is running. Follow the suction L (low) side tube from the compressor to the fire wall. The sensor you'll eventually come to is the low pressure switch. Jump it and see if the compressor kicks on. If it does, that switch is defective. You'll have to have the charge recovered before you replace the swtich.
You should have the car serviced by an A/C tech, the system needs to be evacuated after it's opened up.
You should have the car serviced by an A/C tech, the system needs to be evacuated after it's opened up.
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