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Thread: Tach/fuel guage not working

  1. #1
    Garrett booster
    Join Date
    May 2007
    Location
    Paducah, Ky
    Posts
    97

    Tach/fuel guage not working

    Like it says, the tach and fuel guage aren't working on my 85 SC. After a 7 year build, this is one of the last issues. I don't know if it was working before I did my work on it or not. I have done the pin change to convert to an 87 logic module, but as many times as I have checked and rechecked that, I don't think I screwed something up there. Is this a common problem that I should look in a certain spot for the cure? Thanks...

  2. #2
    Supporting Member Turbo Mopar Contributor GLHS60's Avatar
    Join Date
    Dec 2005
    Location
    Sherwood Park Alberta, Canada
    Posts
    1,645

    Re: Tach/fuel guage not working

    There's a small circuit board behind the tach where the solder joints tend to crack and just re soldering the joints usually cure any tach problems. That's the first thing to check. Good Luck!!

    Thanks
    Randy


    There is no logical reason to call an Engine a motor.

    Randy Hicks
    86 GLHS60
    86 GLHS 373 : SOLD, but never forgotten
    89 Turbo Minivan
    83 Turbo Rampage : SOLD
    Edmonton,Alberta,Canada

  3. #3

    Re: Tach/fuel guage not working

    With both not working, I would suspect the whole board may not be seated well. I did the solder flow of the original solder points, but I also added some dielectric grease to the pins. It shouldn't have anything to do with the conversion.
    [SIZE="3"] [B]Jon Trotter[/B][/SIZE] [B]1985[/B] Dodge Shelby Charger, Currently decommissioned [B]1987[/B] Shelby GLHS, #937 [B]1987[/B] Shelby Lancer, #628 [QUOTE=Reeves;587010]I can be ready. Please send pics of wife. _____DodgeZ add comments here______[/QUOTE]

  4. #4
    Hybrid booster
    Join Date
    Nov 2008
    Location
    Timonium MD
    Posts
    491

    Re: Tach/fuel guage not working

    I've also soldered the big nipple pins to the main board. I had a lot of problems with those pins on my first SC.

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