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2015 Peterbilt 579 light issue

Discussion in 'Trucks [ Eighteen Wheelers ]' started by HurryUpandWaitTrucking, Feb 6, 2022.

  1. Feb 6, 2022 #1
    HurryUpandWaitTrucking

    HurryUpandWaitTrucking Bobtail Member

    1
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    Mar 3, 2020
    0
    So 2 days ago I start my day.. turn on my headlights, get a fault code on dash and passenger side low beam is out. Try replacing bulb, but still doesn't work. Check L2 fuse, looks good. As I'm doing pretrip, I also notice rear passenger running light is out.

    I know very little about electrical issues. Any ideas or suggestions would be appreciated.
     
    HurryUpandWaitTrucking, Feb 6, 2022
    HurryUpandWaitTrucking, Feb 6, 2022
    #1
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  3. Feb 6, 2022 #2
    Arctic_fox

    Arctic_fox Experienced mx13 execrator

    3,969
    20,430
    Sep 16, 2016
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    Easiest fix is to buy a fuse checker or something like this Advance Auto Parts - Down for Maintenance and just check all your fuses in the boxes. If thats not the problem then i would go to a dealer as it could be almost anything.
     
    Arctic_fox, Feb 6, 2022
    Arctic_fox, Feb 6, 2022
    #2
  4. Feb 7, 2022 #3
    GYPSY65

    GYPSY65 Road Train Member

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    SW FLA
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    Wait 3 days
    It might fix itself
     
    GYPSY65, Feb 7, 2022
    GYPSY65, Feb 7, 2022
    #3
  5. Feb 7, 2022 #4
    wichris

    wichris Road Train Member

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    Pound on the dash, that cured the old 359's electrical problems.
     
    wichris, Feb 7, 2022
    wichris, Feb 7, 2022
    #4
    GYPSY65 Thanks this.
  7. Feb 9, 2022 #5
    Bad Monkey

    Bad Monkey Medium Load Member

    576
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    Jul 18, 2012
    Goshen, IN
    0
    On mine it was an internal circuitry issue. Got water inside the housing and shorted something and couldn’t fix it. Required a new headlight housing to fix. $500.
     
    Bad Monkey, Feb 9, 2022
    Bad Monkey, Feb 9, 2022
    #5
  8. Feb 9, 2022 #6
    MACK E-6

    MACK E-6 Moderator Staff Member

    48,292
    221,131
    Sep 19, 2005
    Baltimore, MD
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    That shouldn’t affect a tail light too though...
     
    MACK E-6, Feb 9, 2022
    MACK E-6, Feb 9, 2022
    #6
  9. Feb 10, 2022 #7
    Bad Monkey

    Bad Monkey Medium Load Member

    576
    367
    Jul 18, 2012
    Goshen, IN
    0
    Sorry I didn’t see that.
     
    Bad Monkey, Feb 10, 2022
    Bad Monkey, Feb 10, 2022
    #7
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