69 BB Corvette a/c compressor wiring - NCRS Discussion Boards

69 BB Corvette a/c compressor wiring

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  • Mark B.
    Very Frequent User
    • March 8, 2017
    • 119

    69 BB Corvette a/c compressor wiring

    Guys, Green wire comes from fire wall which leads to two prong connector that guys to the compressor and ground. The other wire goes to solenoid. As one end goes to the solenoid where does the end get hooked up to? Puzzled?

    If you have pics that would be great!!!!
    Last edited by Mark B.; March 18, 2017, 09:57 AM.
  • Steve G.
    Expired
    • November 24, 2014
    • 411

    #2
    Re: 69 BB orvette a/c compressor wiring

    Are you talking about the other end of the idle solenoid wire? If so, on the late build L36 69 I did a couple of years ago, the red fabric shielded solenoid wire plugged into the fuse block. I'm pretty sure the terminal is marked AC.

    The car is long finished and gone so I can't get pics of it. I do recall, however that there was something funny about the factory assembly manual and wiring diagram and/or the new harness I got. Seems to me that the info showed the solenoid fed somewhere else and was consistent with a 68 model year. Forensically I determined that the one I was doing was correct in the fuse block.
    Steve

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    • Mark B.
      Very Frequent User
      • March 8, 2017
      • 119

      #3
      Re: 69 BB orvette a/c compressor wiring

      Steve, It's green wire, like you said, one end goes to the solenoid and the other is a bare wire, but where does it hook up too?

      Comment

      • Steve G.
        Expired
        • November 24, 2014
        • 411

        #4
        Re: 69 BB orvette a/c compressor wiring

        The green wire with a two contact black plug with a short pigtail with a bare eyelet at the end plugs into the clutch on the compressor. the bare eyelet is a ground wire and it is inserted under the one top compressor mount bolt.


        Steve

        Comment

        • Steve G.
          Expired
          • November 24, 2014
          • 411

          #5
          Re: 69 BB orvette a/c compressor wiring

          I believe ac only cars used the idle speed solenoid. It uses a separate red wire with a fabric loom. You can see it in this pic.


          All the pics I have and a folder with reference pics of other cars can be found here

          in case there's something else you might find useful.
          Steve

          Comment

          • Mark B.
            Very Frequent User
            • March 8, 2017
            • 119

            #6
            Re: 69 BB orvette a/c compressor wiring

            I don't see it as the pics is on the wrong side where the compressor is. My wire is green, so the question is then where does the other end of that solenoid wire connect to?

            Comment

            • Steve G.
              Expired
              • November 24, 2014
              • 411

              #7
              Re: 69 BB orvette a/c compressor wiring

              In the first pic you can see the compressor and the green wires coming off the top. That is the compressor clutch and that is where the black two contact plug with the short green ground pigtail goes and includes the long green wire that runs into the ac main harness goes.

              In the second pic you can see the idle solenoid under the air cleaner and the wire coming off of it. This is part of the AC circuit only as far as it is not used in the non ac cars. You can not see the colour of the wire because it has a fabric loom over it, but it is a red wire, a heavier gauge than the green wires plugged into the compressor. That wire feeds through the firewall, under the dash and plugs onto a spade terminal visible on the front face of the fuse block.

              I'm remembering now what the issue I ran into was. The literature, the factory assembly manual, shows a green wire plugging into the idle solenoid. That wire was a third wire that formed part of the compressor clutch plug in. It is still a two contact plug, but the clutch feed wire (not the ground) had an additional wire crimped in that then ran to the solenoid. The operation was that when the clutch was energized, so was the solenoid.

              If you have only two green wires at the compressor plug, yours is as the pic, a separate red wire for the idle solenoid.

              If your plug has three wires, the green double contact plug still plugs into the clutch, the bare eyelet grounds at the compressor mount and the left over green wire with single connector goes to the idle solenoid.

              Later cars changed the circuitry so that the idle solenoid was live anytime the key was on instead of only when the clutch cycled.

              Steve
              Last edited by Steve G.; March 18, 2017, 12:38 PM.

              Comment

              • Mark B.
                Very Frequent User
                • March 8, 2017
                • 119

                #8
                Re: 69 BB orvette a/c compressor wiring

                Steve, thanks a bunch, I figured it out as the wire had broke inside the plug in connector for the compressor

                Comment

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