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Thread: Right trunk tail light has a possible short

  1. #1
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    Right trunk tail light has a possible short

    The right light on my trunk doesnít come on unless I hit the trunk or open and close it really fast. Like shaking it while itís open basically. Is this likely a problem with the light itself?
    Last edited by killian665; 02-13-2018 at 02:01 PM.

  2. #2
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    Quote Originally Posted by killian665 View Post
    The right light on my trunk doesn’t come on unless I hit the trunk or open and close it really fast. Like shaking it while it’s open basically. Is this likely a probablem with the light itself?
    My guess would be a short in the cable loom.

    Mike Barrett
    i
    1996 850Ci Oxford Green/Light Silvergray

  3. #3
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    The right light on the trunk lid may be close to burning out. I had the same problem, (when the engine is on all four tail lights are on), and if I hit the right trunk light it would turn on until it wouldn't anymore. Dealer replaced the bulb. It took only a few minutes.

  4. #4
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    Guess Iíll pop it out and see

  5. #5
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    i had problems with my right tail light' it turned out to be a short in the plug itself.

  6. #6
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    Burnt wire? Loose connection? Howíd you fix it

  7. #7
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    Quote Originally Posted by killian665 View Post
    Burnt wire? Loose connection? How’d you fix it
    Turned to be a broken wire in the harness in the trunk lid. During a "mini" Wrenchfest last year a SocalEights member with the patience of "Job" spliced the broken wire and it's been as good as new since.
    1993 850Ci.....160,000 miles and counting!

  8. #8
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    Timm has a fix up for this under the DIY section.

    In my opinion, the only way to really fix this long term is to cut out and replace the entire wiring section that is between each set of grommets. That is more involved, but ENGL sells a decent kit. Special crimping tool is needed however.
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    Link?

    Quote Originally Posted by toomanyparts View Post
    Timm has a fix up for this under the DIY section.

    In my opinion, the only way to really fix this long term is to cut out and replace the entire wiring section that is between each set of grommets. That is more involved, but ENGL sells a decent kit. Special crimping tool is needed however.

  10. #10
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    Here's the link:

    http://www.meeknet.co.uk/e31/BMW_E31...ing_Repair.htm



    .....but your fault sounds more like a failing bulb than a hinge wiring problem.....
    Last edited by Timm; 02-13-2018 at 11:59 AM.
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  11. #11
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    Iím starting to think it might be more I donít know. My under hood and interior trunk lights also donít work and I just now put new bulbs in them. Must be a wiring problem somewhere even if itís not related

  12. #12
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    Okay yeah, all 3 of my interior trunk lights donít work. The two in the trunk lid itself that are part of the actual taillights and the one in the car under the rear deck. The under hood light also doesnít work. All new bulbs

    *Update*
    My underhood light only comes on when I have the hood open and I turn the headlight switch either to the middle or full on. Is that normal? I feel like it should just come on when the hood is open regardless.

    Also I believe it is the wiring at the hinge because I can get my trunk lights to come on at an exact spot when opening then they go off if itís higher than that point. I didnít think the light under the rear deck on the body itself was part of that same loom as the ones in the trunk lid that shine down, why would that be affected?
    Last edited by killian665; 02-13-2018 at 01:29 PM.

  13. #13
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    Quote Originally Posted by killian665 View Post
    Okay yeah, all 3 of my interior trunk lights don’t work. The two in the trunk lid itself that are part of the actual taillights and the one in the car under the rear deck. The under hood light also doesn’t work. All new bulbs

    *Update*
    My underhood light only comes on when I have the hood open and I turn the headlight switch either to the middle or full on. Is that normal? I feel like it should just come on when the hood is open regardless.

    Also I believe it is the wiring at the hinge because I can get my trunk lights to come on at an exact spot when opening then they go off if it’s higher than that point. I didn’t think the light under the rear deck on the body itself was part of that same loom as the ones in the trunk lid that shine down, why would that be affected?
    That's the way the underhood lamp is supposed to work.

    Mike Barrett
    i
    1996 850Ci Oxford Green/Light Silvergray

  14. #14
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    What a dumb design haha. Well I guess that narrows it down to the harness then. Guess Iíll pull the whole thing out of the trunk lid and see whatís going on.

  15. #15
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    Quote Originally Posted by G8nightman View Post
    Link?
    http://www.engl-production.de/heckklappenkabelsatz.html

    Need some proper crimpers, Greenlee Crimp-all comes to mind. Will need to check the die number.
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  16. #16
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    Yeah those are the factory bmw repair connections. I have the crimpers for those so thatíll work nice, thanks.

    That website sucks how do you even buy stuff
    Last edited by killian665; 02-14-2018 at 01:41 AM.

  17. #17
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    Okay good talk

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