Been fighting some AC issues with a 2002 US D2 v8 without rear air.
Anyway, first I discovered a small oring leak at the compressor, fixed that and system ran perfect for say a month. Then it started getting grumpy through the hot part of the summer. It would start sort of randomly and run absolutely perfectly but only after a short drive. Then it quit. Just started doing diag and found the freon is still perfect. I jumpered the compressor and the system was working fine. Found the condenser fan lock rotor and the 40amp fuse blown. So I put in a new fan and verified I can run the fan from the relay socket as well as the compressor. So now what I am seeing is that the system is not turning the compressor or fan on at all.
I am sure it is somewhere in the control circuit as the big voltage all traces and operates properly and the system is putting out cold air when jumpered. I cannot get the system to run with any combination of jumpers on the coil side of the two relay sockets and both relays bench test fine.
Is this some sort of ground switched Body Control Unit thing like the alarm problem I fought with? I would think key on and AC switched on and both sides set to low I should get 12V at both relays.
Confused as to the logic of switching the compressor and condenser fan on.
Anyway, first I discovered a small oring leak at the compressor, fixed that and system ran perfect for say a month. Then it started getting grumpy through the hot part of the summer. It would start sort of randomly and run absolutely perfectly but only after a short drive. Then it quit. Just started doing diag and found the freon is still perfect. I jumpered the compressor and the system was working fine. Found the condenser fan lock rotor and the 40amp fuse blown. So I put in a new fan and verified I can run the fan from the relay socket as well as the compressor. So now what I am seeing is that the system is not turning the compressor or fan on at all.
I am sure it is somewhere in the control circuit as the big voltage all traces and operates properly and the system is putting out cold air when jumpered. I cannot get the system to run with any combination of jumpers on the coil side of the two relay sockets and both relays bench test fine.
Is this some sort of ground switched Body Control Unit thing like the alarm problem I fought with? I would think key on and AC switched on and both sides set to low I should get 12V at both relays.
Confused as to the logic of switching the compressor and condenser fan on.