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Marker lights won't turn off 387

Discussion in 'Peterbilt Forum' started by conejosriverts, Jan 3, 2015.

Page 1 of 3
  1. Jan 3, 2015 #1
    conejosriverts

    conejosriverts Bobtail Member

    14
    4
    Nov 25, 2012
    0
    I have a 2006 387 and my marker lights stay on all the time. Switches of, key off, park brakes set and lights still on. Headlights go off when switch is off, but not marker lights. Can't find the issue. Someone please help.

    Thanks
     
    conejosriverts, Jan 3, 2015
    conejosriverts, Jan 3, 2015
    #1
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  3. Jan 3, 2015 #2
    FozzyNOK

    FozzyNOK Road Train Member

    2,329
    3,555
    Jul 18, 2007
    Oklahomistan
    0
    This is probably not what is is.. but.. it the switch a "three position" switch? ON - OFF - MARKERS... ?? Make sure the switch is in the middle position maybe?
     
    FozzyNOK, Jan 3, 2015
    FozzyNOK, Jan 3, 2015
    #2
  4. Jan 3, 2015 #3
    BUMBACLADWAR

    BUMBACLADWAR Road Train Member

    1,899
    1,922
    Dec 5, 2013
    0
    Have seen this happen before. Sometimes batteries are changed and cables not tightened down enough. Eventually negative cables vibrate loose enough to where they make intermittent contact and cause weird issues with various lights not shutting off or staying off. Tighten em up.
     
    BUMBACLADWAR, Jan 3, 2015
    BUMBACLADWAR, Jan 3, 2015
    #3
  5. Jan 3, 2015 #4
    conejosriverts

    conejosriverts Bobtail Member

    14
    4
    Nov 25, 2012
    0
    Thanks but cables all tight and only two position switch.
     
    conejosriverts, Jan 3, 2015
    conejosriverts, Jan 3, 2015
    #4
  7. Jan 3, 2015 #5
    Longhood379

    Longhood379 Medium Load Member

    389
    124
    Nov 30, 2009
    Cremona AB
    0
    Find the relay and unplug it, if the lights go out, swap it out with another identical relay to see if they stay out, if the lights are off with the relay unplugged, but stay on with the swapped relay, unplug the switch.
     
    Longhood379, Jan 3, 2015
    Longhood379, Jan 3, 2015
    #5
    kylefitzy and conejosriverts Thank this.
  8. Jan 3, 2015 #6
    Skate-Board

    Skate-Board Road Train Member

    3,801
    3,994
    Aug 9, 2014
    Merrimack, NH
    0
    Pull wires off switch and if the lights go off then switch is bad. In a pinch you can use another switch that maybe an extra or you don't use
     
    Skate-Board, Jan 3, 2015
    Skate-Board, Jan 3, 2015
    #6
    conejosriverts Thanks this.
  9. Jan 3, 2015 #7
    conejosriverts

    conejosriverts Bobtail Member

    14
    4
    Nov 25, 2012
    0
    both great ideas, tried them already. lights stayed on with switch unplugged and with a swapped relay. very frustrating and confusing
     
    conejosriverts, Jan 3, 2015
    conejosriverts, Jan 3, 2015
    #7
  10. Jan 3, 2015 #8
    gudethangs

    gudethangs Bobtail Member

    23
    3
    Dec 14, 2014
    0
    Remove battery cable from batteries for about a minute. Then replace them.
     
    gudethangs, Jan 3, 2015
    gudethangs, Jan 3, 2015
    #8
  11. Jan 3, 2015 #9
    Lyle H

    Lyle H Road Train Member

    1,194
    2,599
    Apr 16, 2014
    0
    Did this just start happening?
     
    Lyle H, Jan 3, 2015
    Lyle H, Jan 3, 2015
    #9
  12. Jan 3, 2015 #10
    Skate-Board

    Skate-Board Road Train Member

    3,801
    3,994
    Aug 9, 2014
    Merrimack, NH
    0
    I'm stumped
     
    Skate-Board, Jan 3, 2015
    Skate-Board, Jan 3, 2015
    #10
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