Volvo RWD 140-160 Forum

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gas gauge and odometer 140-160

posted by  someone claiming to be Jim Hampton on  Fri Jan 16 09:14 CST 2004 [RELATED]

'son says his fuel gauge and odometer ('71 142) don't work. Now there's a cause for excitement as far as guessing when you need to fill up. Is there a common feature that will cause both to malfunction? If so, I'd appreciate knowing what it is as a place to start looking.

Thanks for the help.

Jim Hampton








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    gas gauge and odometer 140-160

    uid 4846's pic
    posted by  JohnMc on  Sat Jan 17 02:47 CST 2004
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Thu Oct 23 07:42 CST 2014
    [RELATED]

    There is no common connection there. The odometer is mechanical and is driven by the speedometer cable which links the speedo to the transmission. If the speedo is also not working then it could very likely be the cable - they go out on occasion. If the speedo is working then there is probably something broken inside the instrument cluster.

    The gas gauge and temp gauge both use a reduced voltage supplied by a little relay-looking gadget that briefly supplies straight 12 volts when the key is first switched on to make the gauges jump up - then a reduced voltage that lets them respond sluggishly to sensor changes (I guess they didn't like seeing the real time sloshes on the older style gauges). If the temp gauge works then it rules that out. Other than that there is the gauge itself, a wire from the dash cluster to the fuel tank, and the tank sender. Try briefly gounding the wire at the tank and see if the gauge responds. If it does - deeply suspect that sender.








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    gas gauge and odometer 140-160

    posted by  someone claiming to be morsa on  Fri Jan 16 09:32 CST 2004 [RELATED]

    What year?
    On the early ones the nuts on the back of the gas gauge were not quite
    right and were probably tightened with a torque-limited device = not tight enough.
    Brute force WORKS!!
    After almost 20 years of a nonfunct gas gauge I tightened that baby up and
    it works FINE!!
    Thanks, Volvo Joe Montieth of Montpelier, VT!!
    (Can you do anything about Dean??)







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