1994 90S, 12V; A/C Compressor not kickin in,
03-29-2007, 10:00 AM
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1994 90S, 12V; A/C Compressor not kickin in,
checked all the fuses, checked wires from the compressor. Light on the AC button in the cab comes on when pressed, then fans come on. Need to know how to diagnose if the pressure sensor is the limiting factor. Any way to bypass all the BS to make sure the clucth is working? May have caused this when I replaced a heater core, but I'm 99% sure I plugged all the wires back together before re-install. All sugestions welcome, issue related that is!
03-29-2007, 10:19 AM
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You can just run +12v to the compressor to see if the clutch works. You can get a lot of
diagnostics from the CC head. Bentley is essential to be able to move around the various channels and to interpret the info.
Also, if you jump the comp and the air blows cold you should have enough charge to keep the low pressure switch on.
Also, if you jump the comp and the air blows cold you should have enough charge to keep the low pressure switch on.
03-29-2007, 11:04 AM
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Ahh Haaa! Cold again!
Follow this: 1) Unpluged sensor coming out of the coil infront of the radiator (is that the low pressor switch (LPS), I'm guessing it is) 2) Started motor, turned A/C on. 3) Jumped the connectors on the down side of the LPS, nothing. 4) Pluged LPS back into harness, CLICK, A/C clutch engauged and icy air once again filled the cabin.
Wierd!
Wierd!
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