I have a 99 Dakota. so far we have replaced. comp, evap core, orifice tube, relay, a/c temp blower switch, both pressure switches, and wire from comp to relay. I have voltage to relay from a/c switch (#86), ground to (86a), power from (30), but no comp. according to conditions in theory. the ac should be working but it isn't. 2 mechanics are boggled with this any ideas?????

 

if we jump compressor it works.

 

Moving this to the second gen dakota section for ya.

First question though, what do your pressures look like.

 

pressures are good if I jump it. it stays at about 30-35 low side. blows cold just wont self sustain.

 

now it is cycling erratically. pressures are still good. switches are bypassed. boggled!!!!!

 

Why did you replace all those parts to begin with?

Trying to get it running?

The switch you replaced you are talking about the cab HVAC dash controls if so is it a new control module or a used one?