Is there a way I can wire around the ecu,on my 93,so the air will work? The ecu on my truck has went bad again,and I can't afford another one right now. I allready have a switch on my o.d.,and a firewall mouted voltage regulator,so the only other thing I would need to do is put a push button on the pre heater. Or am I missing something?

 

Yes, you can tap into the ground wire on the A/C relay and run a switch to ground. The relay is the one furtherest to the rear, and the wire is dark blue with an orange stripe. Put a scotchlock on it and run a wire to ground. The A/C compressor will run whenever you flip the switch.

 

thanks wanna.I thought that was all I needed to do,but a couple of so called mechanics,told me that it wouldn't work.

 

You'll be surprised what mechanics will tell you wont work when you mention doing it yourself and "cheat" them out of money.

Daniel