I've been searching for answers on how the AC system works in my 88 C1500 Silverado. Some places I read newer models that have the "re-circulation" button will open the door by the blower motor to get more cab air (when the AC is turned on), however FWIU the earlier models, like mine, by turning the blower on high, it will open that door. Somewhere I read the high pressure switch on the back of the AC compressor opens this door.
What I can't find is a schematic of the wiring that includes this HP switch to the ECM or the climate control system. Monday, I'm going to replace my compressor, orifice tube, and the HP switch because that switch blew out of the compressor and I'm afraid the snap ring groove is too shallow to hold up again against whatever pressure the old compressor was developing.
I'm going to try some tests like shorting out the switch and see if the door opens. I know from the last time we installed the existing compressor that switch wouldn't do anything to effect it running or not. The low side switch on the dryer/accumulator would shut it off when disconnected.
I'm thinking of hooking the HP switch in series with the LP switch and shorting out the HP connector to allow the fresh air door function. Any ideas/hints as to how it's supposed to work or if my idea will work? Anyone have a schematic for the 88 climate control?
This is all I could find for the AC to ECU wiring; note it only shows 1 pressure cycling switch in the circuit.
I don't want to waste another $240+ on compressors, oil, orifice tubes, and Freon...
Hope this makes sense, I'm on my 3rd Ta-Kill-Ya
What I can't find is a schematic of the wiring that includes this HP switch to the ECM or the climate control system. Monday, I'm going to replace my compressor, orifice tube, and the HP switch because that switch blew out of the compressor and I'm afraid the snap ring groove is too shallow to hold up again against whatever pressure the old compressor was developing.
I'm going to try some tests like shorting out the switch and see if the door opens. I know from the last time we installed the existing compressor that switch wouldn't do anything to effect it running or not. The low side switch on the dryer/accumulator would shut it off when disconnected.
I'm thinking of hooking the HP switch in series with the LP switch and shorting out the HP connector to allow the fresh air door function. Any ideas/hints as to how it's supposed to work or if my idea will work? Anyone have a schematic for the 88 climate control?
This is all I could find for the AC to ECU wiring; note it only shows 1 pressure cycling switch in the circuit.
I don't want to waste another $240+ on compressors, oil, orifice tubes, and Freon...
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Hope this makes sense, I'm on my 3rd Ta-Kill-Ya
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