A/C Compressor quit

1) Jumper wire on the low pressure switch, compressor didn`t come on,

2) Jumper wire on the high pressure switch, compressor didn`t come on,

3) Checked the fuse in fuse panel and checked fuse under hood, they are good.

4) Switched horn relay and A/C relay, nothing happened (yes, I switched them back).

5) Checked the pressure in the lines (screwdriver to needle valve) and it has a lot of pressure.

Seems like there is no power going anywhere to the compressor. Put a test light to all the contacts, it never lit up. If the compressor was locked up, I would think there would be some power somewhere showing up on a test light.

The day before, the coil screwed up and I replaced it, then the A/C quit working. I checked and didn`t see any wires or vacuum lines hanging.

Ideas? :runaround:

Thanks!

Update: I can run a jumper but nothing happens. But, I can run a ground wire to the wiring harness for the low pressure switch and the compressor will run. But, it will run all the time even when the A/C is off. Any ideas, anyone?

how about the dash a/c switch?

I haven`t looked at the dash switch yet. Thought I would read up on it before I messed with it. The blower motor works when I turn on the A/C but not the compressor. I`ll give an update later.

When A/C is selected a ground signal goes to the evap temp sensor, then to the low pressure cutout ;then to the high pressure cutout then to the PCM. The PCM will then activate the compressor relay if everting else is okay at that time.