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Speedo, Tach Dying and Temp bouncing?

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    #1

    Speedo, Tach Dying and Temp bouncing?

    I have a 91 Cb9 wagon with an H22A swap. It's an automatic.

    I was driving home from work and I noticed my speedo and tach falling as soon as I let off the gas and my temp gauge jump. I give it gas and it all goes back to normal. Slow down again, same thing...

    Ideas? Any help is appreciated...

    EDIT: Check the grounds. All nice and tight. My stereo stopped working and my car alarm is "low". I'm thinking alternator? Thoughts?

    EDIT: Alternator is fine. Battery is fine. When I took the stereo cable off the battery, the gauges freak out in park and starts running "funny" (like really low RPM) as it idles...

    EDIT: All the lights on my dash are tripping out. Also, turning the lights on turns the clock off...

    I'm desperate here. I need to get to and from work...
    Last edited by ZAchAtTacK760; 04-03-2014, 09:37 PM.
    Tags: None
    #2
    When the tach acts up, does it do so independently of the engine?
    It sounds like you may have multiple problems, unless you can locate a major grounding issue. Closely inspect all wires first. Clean your grounds and battery connections.
    If that is all good, then the cluster itself may be failing. The speed sensor may be failing. The igniter may be failing.






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      #3
      Originally posted by deevergote View Post
      When the tach acts up, does it do so independently of the engine?
      It sounds like you may have multiple problems, unless you can locate a major grounding issue. Closely inspect all wires first. Clean your grounds and battery connections.
      If that is all good, then the cluster itself may be failing. The speed sensor may be failing. The igniter may be failing.
      It all started literally at the same time

      The tach, speedo and temp gauge all act up at once. in unison. Also other dash lights flicker, the stereo goes out and turning the lights on turns the clock off.

      Comment

        #4
        That sounds like the cluster is going bad but if all of those problems occurred at once then it's likely a wire either not properly touching something, or completely failing. The clock is supposed to dim when the lights are on not turn off. Something is taking up way too much power where it's not needed. Is everything correctly grounded and the contacts are clean?

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          #5
          Fixed. It was a ground wire. It was badly messed up, so I just replaced it. Also cleaned up everything to.

          Thanks for the help

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