Electric problems

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Master of trouble, Jan 11, 2025.

  1. Master of trouble

    Master of trouble Bobtail Member

    1
    1
    Jan 11, 2025
    0
    “Help”
    Hey guys I have a problem and not sure where to start.
    Patient record; 1998 Peterbilt 379,12.7
    I replaced the turn signals with the LED 4 weeks ago,last week when I unhook from my log trailer I lost my rear running lights and brake lights, dashboard lights and the headlights went from dem to hi beam as soon as I plug the pig back in everything works. Any help would be appreciated.
     
    blairandgretchen Thanks this.
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  3. blairandgretchen

    blairandgretchen Road Train Member

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    Dec 9, 2011
    South west Missouri
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    Sounds like more problems than just the change from incandescent to LED flashers, but -

    Change your flasher relay to a LED flasher relay - the old ones rely on a bi-Metal strip that heats and cools , the LED have much lesser draw, thus lower heat generated to activate the heat/cool cycle of the bi-metal relay.
     
    beastr123 Thanks this.
  4. Ridgeline

    Ridgeline Road Train Member

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    Dec 18, 2011
    Michigan
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    Check your Grounds!!
     
    blairandgretchen Thanks this.
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