NissanNismoZ Posted March 9, 2012 Share Posted March 9, 2012 Alright, so we drained everything out of the A/C and checked to see if it could hold pressure. It did. So it's getting warmer out do I figured I'd recharge it. So I did. It's at 25psi (coz it's 70F out) And..it still will not engage? I can jump it off at the relay (connecting two pins to the relay together) and it engages te compressor, and it comes out ice cold. Alright..so I've confirmed my A/C switch works. I've left it jumped off with a fuse between it. It works how it should, only the A/C light doesn't work. It works how it should, but..should I be convinced its a relay problem? Or something else? Thanks! Link to comment Share on other sites More sharing options...
Slartibartfast Posted March 10, 2012 Share Posted March 10, 2012 Sure it's not a blown fuse? Pull the relay out and test the coil. Just hook one side to the battery, touch the other, see if it clicks. If it does, set up a voltmeter on the other pins to make sure it's making/breaking the connection. If there's no click, or it doesn't connect up inside, it's your problem. Past that, I guess it could be a bad switch, or a bad wire somewhere. Link to comment Share on other sites More sharing options...
unccpathfinder Posted March 10, 2012 Share Posted March 10, 2012 (edited) Did u pull a vacuum on the system first?...I'm guessing so but there is a high pressure and low pressure switch that will keep the compressor from burning up...my gf's 95 got a leak and I had to replace the drier before it would work right Edited March 10, 2012 by unccpathfinder Link to comment Share on other sites More sharing options...
adamzan Posted March 10, 2012 Share Posted March 10, 2012 if the cig lighter fuse is blown the ac won't run. Link to comment Share on other sites More sharing options...
NissanNismoZ Posted March 10, 2012 Author Share Posted March 10, 2012 No blown fuses, and yes, we did a vacuum test on it, my bad. Did the test at school for 3 hours (i think it was set to -25psi) and the gauge never rose. I will say, since i have it wired across the terminals of where the relay plugs in, my A/C switch works, it just doesnt light up. It's obvious when it's on though. Link to comment Share on other sites More sharing options...
unccpathfinder Posted March 10, 2012 Share Posted March 10, 2012 Hook it up and see what the high side pressure is...It cuts off somewhere over 400 psi as a safety Link to comment Share on other sites More sharing options...
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