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Thread: Bouncing Speedo

  1. #11
    Jr. Apprentice
    Join Date
    Apr 2012
    Bancroft IA


    New instrument cluster now the speedo bounces above 55 only any ideas or is everyone on here to good to help a disabled vet save some money.....

  2. #12


    Thats beyond my knowledge, Sorry I can't help. Good luck and thanks for serving our country

  3. #13


    mine does that too (sometimes)

    youll need to get a chilton book or some wiring diagram that shows where the speed sensor is. the voltage reading from the sensor itself is bad, or its grounding some how.

    check the wiring, unplug and reconnect the sensor, then proceed to replace it if the problem continues.
    Last edited by K15 Blazer Guy; 07-16-2012 at 02:12 PM.
    Gas was $1.83 when Obama took office.....

  4. #14


    Hey man I had the same problem in my 92 when I first bought it, and what all these guys are saying could very well be your problem. But from my experience it's actually a lot simpler than you think, I'm sure you also have a problem with low voltage/amps. So I'm sure when you crank up the. Lower motor or place any sort of load on the electrical system your speedo will act up. Most of these trucks came from the factory with screw in side post battery terminals, which suck, especially when hack job mechanics try to torque the hell out of the terminals, try drilling and tapping the terminals and finding a bolt that fits, this should provide a better connection and therefore fix your problem

  5. #15

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