Gas gauge troubles

Discussion in 'Electrical & Audio' started by casey3115, May 16, 2018.

  1. casey3115

    casey3115 Junior Member

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    Joined:
    May 15, 2018
    Location:
    Oregon
    First Name:
    Casey
    Truck Year:
    1977
    Truck Model:
    C10
    Engine Size:
    V8
    My 1977 c10 gas gauge has been on the fritz. A few weeks ago it pegged itself way past full. It stayed that way for a few days and then one day when I started the truck it just went back down and was reading accurately again. It was fine for the next few weeks until just a few days ago. Again it pegged past full, then the next time I started it it want back to normal. Next day (today) it pegged it self again and after starting the truck a few times it seems stuck. Any ideas what I'm dealing with? I've had sending units stop working but the gauge didn't act this way.
    Thanks in advance for the help

    Sent from my Pixel 2 using Tapatalk
     
  2. Obwonkonobe

    Obwonkonobe Full Access Member

    Posts:
    415
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    Joined:
    Feb 21, 2017
    Location:
    AZ
    First Name:
    Ethan
    Truck Year:
    78
    Truck Model:
    C10 custom deluxe
    Engine Size:
    350
    Sounds like your sender wire is either grounding or coming disconnected. Be sure it hasn't rubbed through anywhere. The power and ground wires may be bad too but I'd check the sender first since it has to run around the frame. If you aren't afraid to pop open your dash, try running a new temporary wire between the gauge and sending unit on the tank. Try to see over the frame rails and tank when checking the wire. Another option is to drop the tank and check, I replaced both my duals with the bed on, it isn't too hard.
     
  3. Charlie

    Charlie Full Access Member

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    726
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    Joined:
    Aug 2, 2017
    Location:
    Euless, Texas
    First Name:
    Don
    Truck Year:
    1974
    Truck Model:
    Cheyenne 10 LWB
    Engine Size:
    350/TH350/AC/4 BBL Quadrajet
    :welcome:

    One thing you could do is remove gauge, clean (with sandpaper and cleaner, brake clean or alcohol) contact points on back and also the inside of the contact clips in the cluster. I have had some issues similar too this and cleaning helped a lot.
     
    Last edited: May 16, 2018

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