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Elect. gremlin: 1 highbeam flash = 2 ttailgate wiper swishes 760T 700 1988

posted by  steve oakes on  Wed Apr 6 03:20 CST 2005
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last visit: Thu Oct 16 16:05 CST 2014
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Anyone experienced this one before? Flashing the highbeams to let a big truck come out into the hammer lane makes the rear wiper blade grind across the dry window twice. Or does anyone have recommendations as to which of the relays--remember that in my car the relay board is sideways near the passenger's left kneecap--might be involved? Any assistance or advice would be appreciated!

Thanks
Steve








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    Elect. gremlin: 1 highbeam flash = 2 ttailgate wiper swishes 760T 700 1988

    posted by  steve oakes on  Wed Apr 6 06:56 CST 2005
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    last visit: Thu Oct 16 16:05 CST 2014
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    Thanks to you both for your expert advice! The problem was solved after cleaning the ground connections on both sides. I had re-done the driver's side some time ago, so I am assuming that my trouble was on the right side. But I wish I had checked as I went along...

    Thanks again!








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      Elect. gremlin: 1 highbeam flash = 2 ttailgate wiper swishes 760T 700 1988

      posted by  c_j_mooney on  Wed Apr 6 08:48 CST 2005
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      last visit: Wed Sep 14 17:39 CST 2011
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      I could just hear my mechanic friend's voice ringing in my head as I read your description of the problem: "Start with the basics, dumbass!" Once again his wisdom prevails... Glad to hear you've won this round!
      -Chris








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    Elect. gremlin: 1 highbeam flash = 2 ttailgate wiper swishes 760T 700 1988

    posted by  t-bone on  Wed Apr 6 04:09 CST 2005
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    last visit: Tue Sep 21 04:24 CST 2010
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    Steve,

    Check the bank of ground spade connectors on the inside of the front fenders. A bad headlight ground on the passneger side on my 87 745T caused the front wipers to run when I turned the headlights on. Cleaning the connections and a little dielectric grease fixed the problem.








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    Elect. gremlin: 1 highbeam flash = 2 ttailgate wiper swishes 760T 700 1988

    posted by  c_j_mooney on  Wed Apr 6 03:30 CST 2005
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    last visit: Wed Sep 14 17:39 CST 2011
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    First instinct is you've got a bad ground somewhere (presumably in or around the headlight hi/low beam relay) that's causing part of your headlight circuit to backfeed the rear wiper relay.
    -Chris







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