[a.graham52]

Originally Posted by myowneq

So here's an update.

I've been messing with the HVAC control panel. I have now lost all of the electrical controls to the panel. None of the four buttons work nor does the temp control. Neither do the illumination lights. And I still can't get the condensor to come on.

With everything hooked up, I can adjust the speed of the blower and the location (windshield, floor, dash). If I disconnect the double vacuum line, it goes straight to hot.

I went to Pull a Part and got a HVAC panel and I've got the exact same symptons on two different panels, one from a 2001 and another from a 2002.

I'm out of ideas unless I can understand what the wires coming out of the harness do.

There are 8 wires. brown (22 gauge), brown (18-20 gauge), white, black / white, gray, orange, blue, green. These are the bottom 8 wires on the Heater A/C Control Assembly.

Assumptions & figurations: (correct me if I'm wrong)

1) Ign brn is likely to be the 18-20 gauge wire. I should be reading 12v here.
2) Org is labeled Bat on the panel and goes to the left panel fuse block. 12v here too?
3) black / white is ground.
4) Other brn & gray are the interior lights and should be carrying 12v also with the interior lights turned up?

So what should I have on the white, green, & blue?

One other question I thought of on my trip to Pull A Part. If it is low on freon, would the computer turn this panel off?

Thanks,
Timothy

i had an issue like this with my other alero. it once had an aftermarket remote start installed and somone put a scotchlock on the brown wire before it exited the firewall. just prior to buying the car the remote start was removed but wire repair never happend. hence i would have no heat unless i unplugged the controls. check and make sure you have all nessasary 12Vs going to your controls. also.. check fuses, make sure you didnt blow one on accident