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I recently had to reset the EAS on my P38, I had the dreaded Christmas tree of lights, and everything works ok except the air compressor will not come on. I have done the following. 1. Grounded the orange cable going to the pump to by-pass the thermal cutout, no difference. 2. Opened the circuit pins 7 and 9 to bypass the pressure switch, no difference. (open circuit it should run, closed circuit it should stop as it's up to pressure). 3. Actuated the compressor through my laptop and it comes on and pressurizes the system and the suspension pumps up, this tells me the fuses, relay, wiring, pump etc... are good. When I scan for faults through my laptop everything is showing good. What else can hold the compressor out from running?:?
 

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1995-2002 Range Rover P38A
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Did you ever find what was the problem with the compressor not coming on. I have the same issue.

Michael
 
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