Steveb98vette

On 98 vette I was trying to get ac clutch to engage and when I jumped the pressure switch I lost fuel guage,oil sending unit and now my fans run continously. Any ideas on what happened and how to correct.

Steveb98vette

Also I ran the codes with scanner it had 4 codes
1120
0113
1220
1516

dadaroo

Throw your scanner in the sock draw. Please pull your DIC codes. In the interim I will look at the circuit you jumpered.

What color wires did you jumper together. There are 3 there. Red/Black, Grey, and Black.

Steveb98vette

Jumped red and grey fans came on then the thread I read said to jump from battery to black to engage clutch been trying to find wiring diagrahms so far not found one seems all codes say open circuit on ground

dadaroo

Here is the schematic. It would seem you put 12 volts or more into the low reference circuit. That would seem to be a bad thing for the PCM.

Please post the link to where you got this info.




PS: Was the pressure sensor disconnected when you did this?

Steveb98vette

Yes it was disconnected

dadaroo

Link who said to do that?