ll 1st things...
over by airfillter.. big ugly thing w/ red and blue wires.. it needs jumped.. presure switch may be stuck...
then in rain tray is temp prob.. it needs jumped as if it bad it also no work.. tells it if under 32f...
orange light in heater control turn on?
relay in place??
gas vs diesel does not matter my b3 ac worked so nothing part of swap...