2001 Chevy Impala HVAC does not function

Hello,

Thank you for your reply. I do have a digital multi meter. I do not have an ac manifold gauge.

If it is complicated as you suggest it may be, is it one of those things where I would probably be better off just taking it in to have worked on?

I thought if it was something common, and possibly simple, I could do okay, but I do know my limitations to some extent, lol.

Scott

I can absolutely get the control head off. As a matter of fact I replaced it with one from an auto salvage yard, thinking the whole controller was faulty. Thanks for the help.

Scott

Okay, here are the results from the voltmeter:

Connector C1 Terminal B- brown wire= 4.75v

Connector C2 E- orange wire and terminal = 13.8v
" " C- brown wire and terminal = 3.65v
" " B- dark green/ white stripe = 2.8v

Just to let you know, I did not have any of the vacuum lines that attach to the control head, plugged in. I hope this does not matter, but the reason I had them unplugged was because I could not seem to get the trim panel completely free from the dash, so in order to get the clearance for the test leads, I unplugged the 2 vacuum line connectors.

All tests were done with the key on.

The only other problem was with checking ground wires. The only black wire was attached to connector C2 and I am not sure how to check that for ohms, because if my thinking is sound, do you not need both ends of the wire in order to ohm it out? I have the one end, which goes into connector C2, but no idea where the other end goes.

Scott

This may sound dumb, but is there a way I can donate again? The help I have been getting from Docfixit is way above and beyond what I expected.

Scott

Hello Doc,

Thanks for getting back with me. I took an ohm reading, on connector C2, which is the only connector to have a black wire. The multi meter read 53 ohms.

Scott