It is not safe to drive it this way as you are bypassing the safety system built in which is the high and low pressure switches. Basically if you jump the compressor it will not shut off and just continue to build pressure until the system bursts and you have a major failure on your hands. The high pressure switch monitors the pressure and when it gets too high it shuts the compressor off. You will lose this if you jump it all the time.
I attached a wiring diagram and we need to find out why we don't have power to the compressor through the normal circuit.
This system is pretty simple in the fact that the PCM commands the relay to close by grounding the pin 85 on the relay. This causes the relay to close and power from pin 30 goes to pin 87. Which feeds the compressor.
I would do two things. First, remove the relay and jump pin 30 to 87 and see if the compressor comes on. If so, the fuse, and wiring to the compressor is okay.
Next check to see if the PCM can ground pin 85. You do this by turning the AC on with the relay removed, put your red lead of your meter on battery positive, and the black ground lead on pin 85. If the PCM grounds this pin then you will have 12 volts on your meter. If it does not ground it then you will not have anything.
Let me know the results to this and we can go from there. Thanks
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Monday, September 14th, 2020 AT 5:56 PM