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A/C trouble vacuum or electrical?
Posted 27 June 2005 - 03:47 PM
Posted 27 June 2005 - 04:18 PM
how is your idle? if the car isn't idling well the a/c may shut off to prevent further strain on the idling.
i think there's a sensor that disengages the a/c compressor clutch if the rpm's get too low.
and you're sure it's charged properly?
Posted 27 June 2005 - 04:26 PM
Posted 27 June 2005 - 04:53 PM
Posted 27 June 2005 - 05:11 PM
you'll have to hear from others about vacuum issues.
Posted 27 June 2005 - 05:13 PM
Posted 28 June 2005 - 09:24 AM
Posted 28 June 2005 - 10:39 AM
The compressor should run with the defrost/defog selected and I believe the heat to, maybe. The reason being that, especially in defrost/defog, the a/c is used to remove the humidity from the air by running just enough that moisture in the air condenses on the a/c coil. That way when the warm air hits the cold windshield it's dry and doesn't cause fog or ice.
Posted 28 June 2005 - 11:22 AM
I suspect the wiring for the '88 model will be close to a '91 but I don't know for sure. You may want to get a manual for your model year to look things over as some things may be different. The AC control circuit is a fairly complicated circuit to work on.
There may be fuse near the relay on the strut tower also that you should check the voltage at while the problem is happening. It would be nice and simple if there was a connection problem with it.
Posted 28 June 2005 - 08:31 PM
Posted 28 June 2005 - 10:02 PM
Posted 05 July 2005 - 08:32 AM
Posted 05 July 2005 - 08:42 AM
Posted 05 July 2005 - 09:22 AM
Posted 05 July 2005 - 09:46 AM
Posted 05 July 2005 - 10:41 AM
You stated earlier that when you forced the relay closed that the compressor worked ok and also that it seemed to work with the switch also. This means all is ok with the power supply circuit, but if the compressor is not staying on when it should be then other things could be at fault.
Posted 06 July 2005 - 11:16 AM
Posted 06 July 2005 - 12:59 PM
The voltages you saw are most likely normal. It sounds like you were measuring the contacts of a switch or relay that closes to a ground connection when the system is on. The voltage will be across the load then when the circuit is functioning. When the control switch is open and the circuit is off, the voltage then appears across the open connection since the resistance is infinite there. Ohm's Law must prevail.
Posted 07 July 2005 - 09:55 AM
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