2002 Trailblazer LS 4WD, 208,000 miles, Limeswap Tune and 2008 (new) cooling fan clutch.
My A/C compressor is not kicking in, fans are working fine, A/C light comes on when pressed. I have done a lot of research and checked the following:
I have a multi-meter and can take basic readings but that's about it. Do not have pressure gauges.
FYI - I was having an issue with the 4WD not switching and traced that back to the ignition switch which I replaced. That fixed the 4WD and it was the first time I tried to use the A/C after that it did not work. As Murphy would have it, that was on a 8 hour trip. I have double checked the ignition by re-installing the old switch before putting back the new one and double checking everything I did - did not solve A/C issue.
My A/C compressor is not kicking in, fans are working fine, A/C light comes on when pressed. I have done a lot of research and checked the following:
- Fuses both front and back
- Have 4.8 volts on the Low Side switch. Jumpered the switch. Compressor did not kick in
- Replaced relay 44 with one of the others - no luck
- Jumpered the relay - compressor kicks in and A/C appears to work fine
- Bought Ac Pro fill up and checked low side pressure with relay jumpered. Pressure gauge says it does not need a fill-up.
I have a multi-meter and can take basic readings but that's about it. Do not have pressure gauges.
FYI - I was having an issue with the 4WD not switching and traced that back to the ignition switch which I replaced. That fixed the 4WD and it was the first time I tried to use the A/C after that it did not work. As Murphy would have it, that was on a 8 hour trip. I have double checked the ignition by re-installing the old switch before putting back the new one and double checking everything I did - did not solve A/C issue.