ok, so hopefully there is some continuity between the 3rd gen gasser and 3rd gen diesel trucks. I have put a 12v cummins in a 2003 ram 1500 gasser chassis. truck is running/driving but i'm having problems making the a/c work. I'm using a 2nd gen compressor, which plugged straight into the 3rd gen gasser connector and the gasser pressure switch is installed and wired in. now, after vaccing down the system and charging it, i cannot get the compressor to cycle and condenser fan to kick on. i'm assuming its ECM related as I had to run a ground to the compressor relay in order to make it cycle manually.

just looking for some ideas/insight from some guys that have dealt with 3rd gen trucks/wiring. thanks in advance. cheers!