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1993 cruise control doesn't work



I'm trying to install a factory Volvo o.e. cruise control unit from a 1990 240 sedan that I chopped up years ago. I'm installing it on a 1993 240 wagon that never came with cruise control from the factory.

All of my connections I believe are correct since their basically plug-ins.
There is no single spade to the double male spade on the back of the instrument panel. BTW, this double spade was covered by a small piece of yellow heater hose from the factory.
There is one single yellow/red spade wire that was connected to the lower right hand corner of the instrument panel. Considering you have to be very careful not to plug in wires to that instrument panel in the wrong places.

Question is this yellow/red single spade need to go the the double spade to recognize the speedometer reading??








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    1993 cruise control doesn't work

    hi,

    No. I believe that yellow/red powers the overdrive indicator light on automatics. The red/ white is the one that you need to avoid putting in the wrong spot. If you don't have a tach, leave it alone.

    I think a 90 should have a yellow wire from the cruise controller that would have gone to the double spade, and given you a vehicle speed, but I believe that was changed in 91 so that the double spade no longer provided that signal.

    I was doing much as you are doing when I tried using an 87 cluster in my 91. I got a no VSS code. I was told the VSS was supplied through #6 pin on the big connector, I forget the wire color, might have been red, and it should work if the yellow was tapped into that. I never tried it because I was able to get the 91 cluster repaired.

    There may be other things different with a 93, so get a second opinion before going too far. There are others here who know this stuff better than I do.

    Peter








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      1993 cruise control doesn't work

      Yes, I have the red/white spade hooked up to my small 52mm tach that is next to the radio. The yellow/red is in the lower right hand corner ...so that was correct.
      My cruise switch at brake pedal has about 1 mm clearance ...so that should be OK.

      The computer is a Hella 5GA 004 397-05 with large plug-in and a single male spade to the right of that but there is single female wire that is incorporated into the same harness in which it is occupied.
      Kinda scratchin' me head . -Duck








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        1993 cruise control doesn't work

        Well duck,

        Brake lights work, speedo works, and fuse 12 alright ?

        Pin 8 ( black wire)on the controller connected to ground ? Hoses good ?

        A missing VSS will throw a 311 code but it wont trip the check engine light.

        This an automatic ?

        Peter








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          1993 cruise control doesn't work

          Peter,
          Yes this 1993 240 is a automatic and the '90 donor car was also a automatic.
          I did check & clean #12 as well as a few other fuses & interface. Hoses appear to be good, in fact I thought I would get some vacuum draw while placing my finger over the white nozzle on the vacuum pump itself but there's nothing.

          You mentioned pin 8 to be grounded....is that at the directional stalk? There is no loose ground wire from the controller box.
          I don't know what VSS is but I will check the computer codes nonetheless.

          Thanks for your help, I'll check into these matters today.
          Duck








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            1993 cruise control doesn't work

            Hi,

            The black wire at the #8 pin is a ground for the control unit. It goes from the unit to somewhere on the body of the car. On my 91 I traced it to the left side of the center console. On a 92 it ended up on the floor by the passenger's left foot. I don't know about your 93.

            If you have a meter, you could disconnect the plug at the control unit and check for continuity between that black wire on the harness and any ground point.

            The VSS is the vehicle speed signal. It comes from the rear axel to the speedometer. A functioning speedo would indicate that part is alright.

            That signal is then sent to the cruise control unit on a yellow wire. A 90 would get it from the double spade. Later models get it somehow from the blue/black wire at #6 on the big plug at the back of the gauge cluster. The Bentley schematics simply show a yellow wire between the speedo and #5 at the control unit without any details on how it gets there.

            The brake lights are also part of the circuitry. They have to be working normally for the cruise to work.

            I haven't looked but there's probably information in the FAQ about testing the stalk or other components.

            Peter








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              1993 cruise control doesn't work

              Peter,
              You were absolutely correct to check the ground from #8 from the control unit.
              The black wire I had coming out of the plug went to no where. I followed it through the loom and it did attach to anything so I spliced into it and attached to a appropriate ground. We have a working cruise control now.

              Thank you, Duck







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