Outer Limits 4x4 Board

i recently swapped out the wiring due to the wires were old and breaking apart.i have a petrol Rocky which i swapped in the diesel wiring.Everything is working except for the air conditioning.i noticed the pinout from the a/c ecu is different for both petrol & diesel versions.i even have the diesel a/c ecu but nothing.Neither the compressor or the electric fan is running.there was no cutting or splicing the diesel wiring of any sorts.a complete and unmodified harness.Anyone have any ideas?

thanks in advance

Is there gas in the system as there is a low pressure switch which will stop the compressor if there is no gas.

just filled up.no leaks.