Has the double relays hanging on core support. Condensor fan and Radiator fan run fine. Traced to relay, can remove and jump across plug and compressor runs and system all runs fine. Bought new relay, same problem. Its a 4 prong relay, dont have schematic but seems awful strange will run compressor when jumped at connector. What am I missing? When I test plug, 2 terminals are hot with key on, 1 has ground. 1 seems dead.

 

Are you low on freon?

 

No. Sytem works normally when jump across connector. Put gauges on it to make sure and pressure is good. What I really need is a schematic of the relay connector, It appears Im missing a ground. My guess is ECU supplied.