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Guest Message by DevFuse
 

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AC compressor has 3 wires?


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4 replies to this topic

#1 greggbrat

greggbrat

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Posted 03 April 2004 - 09:54 PM

My 87 RX AC compressor has 3 wires going to it. I understand ground and 12v but what would the third wire accomplish? Basically my AC is not working. I checked the freon charge and it looks good, next I tried to hotwire the AC compressor to see if the clutch engages but I dont know know which wire to use. Any ideas?

Thanks,
Gregg

#2 rallyruss

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Posted 04 April 2004 - 12:31 AM

if im not mistaken there are 2 wires that will go to the sensor on top of the compressor and another single wire (blue?) that applies power from the relay to the coil and is case grounded.
looking at diagram from an 85 right now 87 should be similar. I can check one of my cars in the morning if need be.

#3 greggbrat

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Posted 04 April 2004 - 09:40 AM

I just double checked my AC wiring. I have a total of 5 wires.

- 2 wires go to the pulser sensor on top of the AC pulley
- 1 blue wire to AC Compressor (with its own harness connector)
- 2 wires to AC Compressor (1 blue and 1 black from a different harness connector)

Any ideas?

Thanks,
Gregg

#4 greggbrat

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Posted 04 April 2004 - 01:00 PM

I was able to hotwire the AC using the single blue wire and it blows cold. Now I need to figure out why the compressor clutch is not getting 12 volts. I still have no clue what the other 2 wires to the compressor are for.

Time to start a new thread......see if anyone can assist in AC problem.

#5 rallyruss

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Posted 05 April 2004 - 01:20 AM

pressure switch?




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