[QUOTE=cocobolo95;954689]Yes, there is a safety switch that does not allow compressor to run when r134 pressure gets too low.
You need to consult 95 service manual to see which wires on compressor relay to jump to get compressor on long enough to take in the r134.
However, only jump relay long enough to get enough r134 in system so compressor will run on it's own.
Another problem you may have is; if pressure in system falls below atmospheric air pressure, air & moisture will be drawn into system. This is a mucho bad thing as moisture causes the system oil to create acids that attack metal parts of system.
It would be best to have r134 gauge set attached to system when you attempt to recharge system. If pressure in system is below 14 psi, with compressor running, you have moisture in system.
It will need to be flushed & vacuumed out before recharging. If you do not, your compressor will fail in a short time, as well as condenser & evaporator.[/QUOTE
Got a chance to work on my car for a few hours yesterday to try and diagnose what's going on with the ac. My friend who's an ac tech put his gauges on the system and it was reading about 20psi, so low but not super low. So he put some refrigerant in and got the psi up to about 30 but the compressor still didn't turn on.
Next we removed the relay for the compressor and ran a jumper wire from it to the battery and the compressor came on and the air started getting cool inside the car. It seemed to run perfect not making any noises.
Next he checked to make sure that the relay wasn't bad by putting an identical relay (i think the one that runs the fog lights) and the compressor still didn't run.
So then we checked the power plug that goes into the compressor and it was plugged in tight.
Then he thought that maybe the ac pressure sensor might be bad so we called O'reilleys and they had one in stock so we drove to the store and the very nice manager let us put it on the car but still no dice
So what could still be keeping it from running? Could the ac control switch inside the car be not working all of a sudden? Or maybe a bad wire between the relay and the compressor. Thanks in advance for your help.
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