Problem with Autometer water temp gauge

Discussion in 'Ignitions & starters and electrically related comp' started by 55C150, May 9, 2018.

  1. 55C150

    55C150 Well-Known Member

    I have a Autometer Cobra Series electrical water temp gauge (Part no. 201015). The first 3 days it worked fine. After the coolant get hot last weekend (200F) the gauge quit. Yesterday I found out that it will work when I disconnect the ground wire to the gauge, so only sender and the + wire are connected.
    Is that normal? The sending unit is grounded by the engine.
  2. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    Contact Auto Meter by Email.
    Let them know the problem.
    Sounds like a Bad sending unit.

    I have read reviews of standard Autometer Sport comp gauges and just so so today.

    I prefer full mechanical bourdan capillary tube gauges.
    Pro Comp is the Best to Buy. Have to pay extra $$.
  3. 55C150

    55C150 Well-Known Member

    My Club brothers told me the same on the mechanical gauges. Water temp would be no problem. But I don't want fuel pressure or oil pressure full mechanical, if they fail I have fuel or oil in the inside of the car.
  4. Loves302Chevy

    Loves302Chevy "One test is worth a thousand expert opinions."

  5. 55C150

    55C150 Well-Known Member

    I got it from Summit Racing
  6. 55C150

    55C150 Well-Known Member

    I wrote Autometer, the gave me a describtion to find out if I have a bad sending unit or gaue. I found out that the sending unit is bad. Like you said.
    I ordered a new one, in 3 weeks I will hopefully have a working water temp.
    Thank you for the advice.
  7. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    Ok. Your Welcome.

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