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Old 07-26-2010, 08:32 PM
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Its hot help!

The PO didn't have AC in my 83 chevy silverado. I am trying to get it going. The problem is I dont have any power to the dark green wire going at the 2 prong connector for the compressor. I checked the fuse and it looks good. I am trying to see if you guys can help me track down the problem. I have downloaded a wiring diagram and looked at the Haynes manual and cant seem to find that particular wire. Please help its hot here in OK

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Old 07-26-2010, 11:37 PM
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If your refrigerant pressure is to low the compressor won't turn on. That is safety control to protect the compressor. Do you know if there is still refrigerant in the system?
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Old 07-27-2010, 03:44 AM
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hmmm..I was in the middle of charging the system the last time I saw the compressor engage, but the belt had got twisted since my compressor and power steering pulley were a little out of alignment and loose. Since I have fixed that issue I have not tried to put anymore refrigerant in the system, wondering if I had got a bad compressor from the salvage...are you saying if the refrigerant is low it will keep the compressor from getting power?

My father in law jumpered the clutch and it clicked. I was trying to keep from wasting the refrigerant, but it looks like I will have to add some more and see what happens.
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Old 07-27-2010, 06:30 AM
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did you jump it at the pressure switch where your saying no power? or check it with a test light see if there is power? an if you jumped it an it clutch on compresser clicked an engaged than no prblem with power i'd check for freon in the system an if so than i'd look at pressure switch in the system!
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Old 07-27-2010, 09:35 PM
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I had tried to add more refrigerant and the compressor didn't come on/no power to the dark green wire connected to the compressor. I followed the dark green wire and it goes from the compressor to a 2 prong connector by the firewall to a connector at the accumulator. Can you guys tell me where the low pressure switch is located. Is it the 2 prong connector at the accumulator?
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Old 07-27-2010, 09:50 PM
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Quote:
Originally Posted by for3300
....Is it the 2 prong connector at the accumulator?
Yes, thats the pressure switch.
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Old 07-29-2010, 09:06 AM
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yes it should have power to the switch to turn on compressor! so if no power to pressure switch so no power to compressor, so check see if you have power at pressure switch they are both dark green so one should have power so when switch has pressure it put the power to compressor electric clutch to engage it! an if no power to pressure switch than it could be the controler in the dash to put power to the system if you have power to the fuse for the ac than you power is feeding the system!
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