Auxiliary fan isn't coming on, so ram and I have been trying to put our heads together.
What we know:
Auxiliary fan works when battery voltage applied directly.
Auxiliary fan controlled by two temperature switches, one on the block and one on the receiver/dryer. Both passed and/or are new.
Auxiliary fan affected by low refrigerant pressure.
There sounds like the refrigerant system has a leak from the expansion valve, as when the compressor comes on, there is a microsecond hiss from under the right had side of the dash.
Receiver/dryer temperature switch bypassed doesn't cause the fan to come on.
Auxiliary fan relay is new.
P3/ Relay ground (30) has no ground (one on volt meter with no reading).
6P6/ 87 has ground.
87a has 0.1 volts.
Now what?
Thank you in advance!
