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C3 Wiper Relays

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  • Bryan M.
    Expired
    • March 31, 1999
    • 386
    #1

    C3 Wiper Relays

    I've been following the other thread about C3 vacuum troubleshooting and was wondering about being able to rebuild the relays.

    My 72 just went through a headlamp/wiper door problem.
    The left headlight was slow to open and close. The right headlight did not open or close. The wiper door did not move at all.

    I started trouble shooting at the headlamps. I took out both headlamp relays and tested them by blowing through the control side nipples. I could not blow though the left side relay (lazy eye). I could blow through the right side relay (dead eye). I installed a new set of GM relays and now my headlamps and wiper door snap open and close like it should and it holds vacuum after I shut the car off.

    Has anybody tried to rebuild a relay? I took apart the leaky one and found the rubber dog bone seal to be worn out. Everything else looked to be okay.
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    • Jeff G.
      Expired
      • October 25, 2006
      • 187
      #2
      Re: C3 Wiper Relays

      There is not really much to a relay. Contaminents are really the only evil to the relay contacts inside. Clean the inside with alcohol and you should be good to go. Other relays of concern are the Horn and AC.
      Jeff
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        • Bryan M.
          Expired
          • March 31, 1999
          • 386
          #3
          Re: C3 Wiper Relays

          Originally posted by Jeff Groover (46451)
          There is not really much to a relay. Contaminents are really the only evil to the relay contacts inside. Clean the inside with alcohol and you should be good to go. Other relays of concern are the Horn and AC.
          Jeff
          Jeff,
          Sorry for the confusion. I'm talking about the headlamp/wiper door vacuum relay or maybe they are called actuators.
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            • Roberto L.
              Expired
              • December 31, 1997
              • 523
              #4
              Re: C3 Wiper Relays

              One of the main problems of the system are the vacumn relay, which is not an electrical device despite the name but a vac device. Usually it has vacumn loses in the diaphragm and in the rubber piston.

              I speak from my own experience, they are difficult to repair, but it is possible to open the main case to repair the diaphagm, not always a succesful job... better to buy new ones, but they are expensives...

              Regarding the other electrical devices of the wiper system (relays and solenoids) they are repairable.

              Best regards
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                • Jeff G.
                  Expired
                  • October 25, 2006
                  • 187
                  #5
                  Re: C3 Wiper Relays

                  Ahh the actuators, my mistake. Agree with Roberto, diaphram...
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