90 Engine pulled now no ac - ZR-1 Net Registry Forums

Mr Cool · 09-01-2012

I had my engine pulled for the stage one treatment, removing the secondary setup, headers, tune, etc.

After getting the car back the ac compressor would not engage. I can ground pin 16 on the C connector and the compressor will run and cool good. I have a signal on pin 2 C connector commanding the ac on. But with the C connector plugged into the ecm the compressor will not turn on.

Does anyone know the location of the ac clutch relay on a 90 so I can bypass it and get the ac running temporarily. And is it possible during tuning the ecm could have been accidently set so the ac would not come on?

Also I'm working from a 93 book my 90 book does not have section 8A so maybe i'm missing something else as far as the operation of this system.

Tom

09-01-2012	#1
Mr Cool Join Date: Sep 2010 Location: Panama City Beach Posts: 26	90 Engine pulled now no ac I had my engine pulled for the stage one treatment, removing the secondary setup, headers, tune, etc. After getting the car back the ac compressor would not engage. I can ground pin 16 on the C connector and the compressor will run and cool good. I have a signal on pin 2 C connector commanding the ac on. But with the C connector plugged into the ecm the compressor will not turn on. Does anyone know the location of the ac clutch relay on a 90 so I can bypass it and get the ac running temporarily. And is it possible during tuning the ecm could have been accidently set so the ac would not come on? Also I'm working from a 93 book my 90 book does not have section 8A so maybe i'm missing something else as far as the operation of this system. Tom __________________ ________ 90 white/grey #2011