Fuse blowing

Discussion in 'Ask An Owner Operator' started by Thotphobia, Oct 31, 2022.

  1. Thotphobia

    Thotphobia Light Load Member

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    Hey guys, I was wondering if any of you guys ever had a problem like this, my fuse for the gauge lights keep going out, and even when I try to put a new fuse in, it blows out before I even try to stick it in. I checked behind the dash, I changed the ignition and still nothing. Any help would be appreciated!
     
  2. shatteredsquare

    shatteredsquare Road Train Member

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    use a bigger fuse until it stops blowing then follow the smoke to the fault location
     
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  3. Inderjit

    Inderjit Heavy Load Member

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    what make of truck and what year?
     
  4. Thotphobia

    Thotphobia Light Load Member

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    Everything works, turn signals, emergencies headlights, exterior lights, just the gauges are the bad ones
     
  5. Thotphobia

    Thotphobia Light Load Member

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    1990 peterbilt 379
     
  6. shatteredsquare

    shatteredsquare Road Train Member

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    if you have a dash mounted dimmer switch for the gauge cluster check the dimmer switch and its housing for corrosion and condensation, there are tabs or something on the side of the switches you can pop the box out and pop out the individual switches to inspect/clean/replace
     
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  7. D.Tibbitt

    D.Tibbitt Road Train Member

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    Is it your gauge lights? Or your actual gauges not working? You probably have a wire rubbed thru, grounding out on a piece of metal behind the dash
     
  8. shatteredsquare

    shatteredsquare Road Train Member

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    jfc it probably needs a new stack of D cells
     
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  9. tscottme

    tscottme Road Train Member

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    You have a short-circuit. If you put in a big enough fuse to not blow you will be buying a new wiring harness or truck after the fire dept is finished with their work. The short-circuit could be caused by an almost broken wire, a pinched wire, a screw driving into wires somewhere.
     
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  10. Rideandrepair

    Rideandrepair Road Train Member

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    Look for brittle or broken wires, melted plug at switches. Might get lucky and find something. Dome lights shorting out and causing fires was a problem on early 90’s Pete’s.
     
    D.Tibbitt, RJM1953 and Diesel Dave Thank this.