First of all, thanks for everyone's input in re: to my "master plan" of upgrades. They were all really helpful, and I'm well on my way!
Here's the scoop -
On a recent trip from Austin to Denton, my A/C cut out. It was blowing plenty cold when I switched it over to vent for some power (it's a 4 banger, and I was going uphill ). When I switched it back to A/C mode maybe 15 minutes later, the air temp didn't get cold.
What it DOES do is drop the engine RPM a little bit like it used to when it worked. So, at idle, I can have the vent (fan) blowing just fine. When I switch it over to A/C, the idle RPMs drop a little (like it always used to), but the air doesn't get cold.
What I've tried so far:
Coolant check - My stepdad works on A/Cs for a living, and the coolant pressure level tested fine.
Compressor check - Not sure if what we did was ok, but tried putting 12v across it to see if we could hear the clutch engaging. Never did.
Switch removal - I removed the switch in the dash and Deoxd the daylights out of it... that's when I noticed that the bottom of the switch looks pretty blistered (see below). I hooked it back up, tested it, and both it, and the thick black wire that's connected (there are three wires: one green and two black) are getting really really hot.
So where do I go from here? I've got a multimeter and can sort of use it. Any and all troubleshooting steps are greatly appreciated!
ALSO - Does anybody know what size bolt attaches the stabilizer bar link to the tie rods, etc.?
"""""What's a smart way of testing the clutch on the compressor?"""""
Open the connector at the clutch.
One wire - apply 12 volts to it.
Two wires - one gets 12 volts, the other gets grounded.
Polarity doesn't matter as long as the connector is disconnected.
Clutch should engage.
It's no wonder the country is falling apart - stupidity abounds!
Howdy - I was able to successfully test the compressor clutch. I put 12V across it, and got a good click. I started the jeep, and "manually" engaged the compressor, and sure enough, the A/C blew good and cold. Glad it's not that.
So NOW what? Replace the switch, obviously (can anybody recommend a good source for one?), but what's making it heat up so badly?
If the clutch engages manually, then it's not bad. The switch could be the reason the a/c won't engage as well. But first, check the low pressure switch, verify that it is in closed position, because if it's "open" then that means that the system is low on refrigerant.
To test, locate low pressure switch, remove connector and use a continuity test or voltmeter to verift that the circuit is closed and you can get current accross the pins.
2011 RCLB Silverado, It's got the power I need. Wiring Diagrams!
"You're just about to get a bump and poke back.."
Deathphoenix99 - Thanks for the next step! I'll most likely give it a go tomorrow. @DMCG - Man, I understand where you're coming from. However, there are certain females in my life who prefer the A/C. Plus, I don't really mind spending the time under the hood, getting to know everything better. I drove a 2000 VW GTi VR6 for the last 10 years, and everything is so computerized and condensed, that a normal dude like myself had no chance at making anything work (for the record, my car before THAT was a 1991 Honda CRX Si - GREAT car, and you could do a lot with it! Before THAT a '63 1/2 VW Bug). Hence, I enjoy the challenge of the troubleshooting process.
Again, does anybody know the size of the bolt attaching the stabilizer bar link to the tie rods?
It's now Wednesday, A/C still isn't fixed. Now there's a "leak" Hell's bells, wish I'd never started fooling with it, it's a nice to have in Houston but I do have another vehicle, and i bought it for Colorado's mountians. I'm in $600, $100 at a time!