Hi,

I'm a little gunshy after my last endeavor left me with a burnt tacho output (it's fixed now). Didn't want to just set off on my own without seeking some advice.

MS3 by Reverant
96 chassis
Used to be equipped with A/C but has since been removed

Before A/C was removed, I had disconnected the compressor trigger wire so that I could use the interior A/C button and trigger the second fan manually. It was pretty nice to keep the car at a <200 temp (primary fan temp) while staging in grid for Autox, then shut it off when I get to the line and avoid the inevitable idle sag when trying to take off if the primary kicked on.

Now that the A/C stuff is gone, this no longer functions. I'm guessing that maybe there's a pressure switch that used to be present and is keeping this from working?

 

For a '94 at least (don't know what year you have), make sure your condenser fan relay is still present, power window fuse is intact, "AD fan" fuse, and that the fan is grounded. ECU should send the ground signal to the relay to activate.

 

Correct. You can bridge the pressure switch though and everything will be fine.