A/C prob 96 Grand Caravan

I have a 96 Grand Caravan and the compressor works intermittently. I have
checked the R-134a pressures and it seems ok. This problem seems to be in
the control circuit for the clutch since if I cycle the compressor switch in
the cab it will often come on for a time or even work till the car is turned
off. I don't have a wiring diagram to troubleshoot the circuit and was
wondering if some of the experienced people who post here was aware of a
common problem with this.

TIA,
Mike

 

A cycling compressor clutch usually means the refrigerent charge is
low,however Chryslers are known for having defective themister
switch,located in the high pressure ac line.It has three wires going to
it.Chrysler offers an updated replacement part.System needs to be scaned
for proper diagnosis.

 

Thanks for your help, I'll check into that.

 

Check the a/c charge with a set of gauges, sounds to me as if it is low on
R134

 

the system is able to record fault codes and that should be the first step
before any parts are bought
they are stored in the bcm and the hvac module and sometimes the pcm