southnash

For the past few days, I have been troubleshooting possible solutions to my problems. Maybe you could help me out. I would appreciate it...

My A/C clutch & fans do not kick on. The fans do work for engine cooling, but not for the A/C.

I checked the A/C clutch relay (of course fuses) & it checks out fine. If I jump the wire for the clutch it does engage.

I bought a Manifold gauge & hose kit to test for pressure. I tried to jump the High/Low A/C Pressure Switch to engage the clutch & nothing... So I went ahead & engaged the clutch from the relay to test the pressure & it was kinda low. I added a little bit (up around 35 p.s.i. on low the gauge & 200 on the high) & I hoped when I plugged the relay back in it would kick the clutch back on....nope!

I did notice something weird, it would hover at around 35 p.s.i. low/ 200 p.s.i high but then both gauges went up to around 50 p.s.i. low/325 p.s.i. high & I heard a noise from the receiver/dryer area (front passenger side) & it went down back to 30. It would repeat every 3-4 minutes.

It did cool down a little (5 degrees) in the car, but since I jumped the clutch, I didn't want to run it for long.

So, I'm down to the A/C thermostat or the ECM module. I grounded the blu/red wire (while plugged in) on the a/c thermostat plug & the clutch/fans still did not engage. But the other two wires did check out... I am unable to test the ECM due to the "special wire harness" required.

Any idea's, comments or suggestions? THANKS!!

mpumas

You say you grounded the blu/red (red/blu) wire on the clutch relay and the clutch did not engage? But the clutch did engage when you jumpered the yel/blk to red at the relay. Is that correct? If so, you might have a bad a/c compressor clutch relay. At the relay, the blu/red is only looking for ground to energize the relay which would then engage the clutch.

southnash

I connected the white & red wire at the relay. The clutch did engage. The blk/yel does have power, but cannot test the ECM side.

Sorry I forgot to mention that I just replaced the radiator fan module. (burnt diode) I'm guessing whtever caused that, is causing my a/c not to work.
I just bought the car & someone jimmy rigged a wire under the hood fuse box to make the fan run all the time.