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379 95 pete accessory relay behind the dash

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Truckertrucker39, Sep 13, 2018.

  1. Sep 13, 2018 #1
    Truckertrucker39

    Truckertrucker39 Bobtail Member

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    battery gauge and speed odometer,and battery gauge were not working.saw a post from a few years ago about checking the accessory relay behind the dash and jumping it.as soon as I jumped it everything started working so I assume the relay is bad.my question is will jumping that relay cause any problems until I can get a new one and what gauge wire should I use
     
    Truckertrucker39, Sep 13, 2018
    Truckertrucker39, Sep 13, 2018
    #1
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  3. Sep 13, 2018 #2
    Goodysnap

    Goodysnap Road Train Member

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    Get the part. Pretty sure your talking about the big circuit breaker. Dont leave it jumped. Risk of electrical fire if theres a short inside the cab.
     
    Goodysnap, Sep 13, 2018
    Goodysnap, Sep 13, 2018
    #2
    Dino soar, wore out and AModelCat Thank this.
  4. Sep 13, 2018 #3
    AModelCat

    AModelCat Road Train Member

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    If its a breaker, never jump them out. At a minimum I'd use a fused jumper (fuse equal to the breaker rating) and only for diagnostic purposes. If any of the power wires off that breaker ground out when its jumped out, it will burn.
     
    AModelCat, Sep 13, 2018
    AModelCat, Sep 13, 2018
    #3
    Oxbow, Dino soar, BoxCarKidd and 1 other person Thank this.
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