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Thread: Tachometer needle sits at 1900 when the key is off

  1. #1
    Registered User
    Name: Drew


    Join Date
    Mar 2019
    Location
    Bloomington, IN
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    Tachometer needle sits at 1900 when the key is off

    The needles don't do the "full sweep" that I've read about which would indicate a bad battery, alternator, or both. When I turn the truck off, all of the needles move to zero (including the tach) but the tach then returns to 1900. Once I put the key in and turn to on, the tach moves to zero. If I start the truck, the tach shows normal operating RPMs until I turn it off, which it will go to zero and then pop back up to 1900 with the key off. The truck is running just fine and all seems well. Weird. 01 HD w/ 122K miles.

  2. #2
    Registered User
    Name: Chuck


    Join Date
    Aug 2015
    Location
    Charleroi,Pa
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    Check the grounds behind the left kick pad, remove the screws and clean the contact areas.

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