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chevy trucks low voltage on the guages

Discussion in 'Chevy Trucks' started by eatonpaving, Dec 7, 2010.

  1. eatonpaving

    eatonpaving PlowSite.com Addict
    Messages: 1,065

    one is an 88 and the other is a 94, both show low voltage with all lights on, but i check it at the battery and its 14.2 and 14.5 what could be the problem....

    thanks in advance.
     
  2. DJ Contracting

    DJ Contracting PlowSite.com Addict
    Messages: 1,392

    Body to engine and body to frame ground straps replace them
     
  3. plowmaster25

    plowmaster25 Junior Member
    from ma
    Messages: 11

    88 chevy

    hello i think you should check your fuse links, altenator and, ground wires. but it sounds like the regulator in the in the altenator is gone. good luck
     
  4. DJ Contracting

    DJ Contracting PlowSite.com Addict
    Messages: 1,392

    ???? he show full voltage at the battery it's not reading correct at the gauges there for not a voltage regulator or alt. I'm just saying.
     
  5. maverjohn

    maverjohn Senior Member
    Messages: 902

    My 89 chev shows about the same as yours, I think the gauges just don't show the voltage as well as a mutimeter will.
    I'd try what DJ said and a battiery test as well
     
  6. DJ Contracting

    DJ Contracting PlowSite.com Addict
    Messages: 1,392

    After I replaced my ground straps the gauge read the same as my tester at the battery.
     
  7. Pharoah72

    Pharoah72 Junior Member
    from MD
    Messages: 6

    Where did you get Ground Straps?
    Are you running two batteries?
    I have everything to install second battery on my 94 'cept for cables. Any thoughts on best way to get cables? I even bought a Battery isolator / combinor from Hellroaring.

    Thanks
    RC
     
  8. DJ Contracting

    DJ Contracting PlowSite.com Addict
    Messages: 1,392

    I bought my straps from Car Quest
    Only running one battery
    No idea on cables and how to set it up.
     
  9. kingcat400

    kingcat400 Member
    Messages: 36

    down by the obd plug there is a black wire that is the ground for the gauge. check that. do you have the big 3 mod done
     
  10. DJ Contracting

    DJ Contracting PlowSite.com Addict
    Messages: 1,392

    What's the big 3 mod?
     
  11. kingcat400

    kingcat400 Member
    Messages: 36