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1962 Impala fuel gauge question

Discussion in 'The Hokey Ass Message Board' started by Bman416, Jul 9, 2011.

  1. Bman416
    Joined: Nov 4, 2007
    Posts: 180

    Bman416
    Member

    Fuel gauge in wagon no worky! I checked the ground wire near tank. That seemed to be fine. My next step is the gauge itself. I took it out from the dash and pulled the plug. Now, im not too electrically savvy so heres my question: I turned the key to the ON position, put the test light into the female ends of the plug that goes into gauge and had no power. Should there be power coming out of one of those wires? I'm not really sure how the gas gauge works.
    Its easy to just pull the gas cap and see how much gas i got left but its a real pain in the ass.

    Brian
     
  2. R Pope
    Joined: Jan 23, 2006
    Posts: 3,309

    R Pope
    Member

    One wire should have (resisted) power, the other grounds through the tank sender. The resister could be burned out. Don't hook full 12v power to the circuit, you'll fry something else.
     
  3. 48 Chubby
    Joined: Apr 29, 2008
    Posts: 1,014

    48 Chubby
    Member Emeritus

    Test light is NOT the right tool here. You should only have like 6 to 8 volts to the guage. The sending unit is just a variable ground, and the gas guage measures how much current moves through it. The "groundeder" the sending unit is the more electricity gets through. You should have a resister on or near the guage panel.
     
  4. The pink wire will be your + (works with ign.switch), the brown is from sender and is a resistored - at differant values per fuel level.
    FYI, if you try testing the gauge or gauges out of the dash they will not work. The dash cluster needs to be grounded for them to operate correctly.
     
    Last edited: Jul 9, 2011

  5. MORRISGAUGE
    Joined: Jun 6, 2011
    Posts: 238

    MORRISGAUGE
    Member

    Your 62 is a 12 volt gauge. You should have 12 volts going to it from the key switch. What is the ohm value of the sending unit wire to ground? Your sender is a 30 ohm unit : 0 empty 30 full.
     
  6. Bman416
    Joined: Nov 4, 2007
    Posts: 180

    Bman416
    Member

    I told you I wasn't very electrically savvy. Hope I didn't screw anything up. I had two other fuel gauges to try. They didn't work either. Next thing to check would probably have to be the sending unit in the tank. Wonder if I should just deal with not having a gas gauge. Nice piece of information to have though. Thanks guys.

    Brian
     
  7. Hello

    I had some problems with our 58 Ford; I just bought this voltage regulator from E-Xxxx.
    The instruments like fuel and the temperature sensors use a voltage regulator to increase the voltage can be different between cars but our 58 ford was 5, 5 volts. This is just for the instruments should show the right if the engine is on or of, 12, 6 volts of and 13, 5-14, 3 on.
    When the instruments use a lover voltage they always show the right information,,, everything clear?

    http://cgi.ebay.com/ebaymotors/Mode...r_Truck_Parts_Accessories&hash=item3f03cd3591

    Lars
     
  8. MORRISGAUGE
    Joined: Jun 6, 2011
    Posts: 238

    MORRISGAUGE
    Member

    The 58 Ford and 62 Impala have completely different gauges.
     
    Last edited: Jul 11, 2011

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