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My Tacoma continuously blows the tail light fuse. ANy idea why or where to start looking?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by RunAround88, Feb 13, 2017.

  1. Feb 13, 2017 at 5:06 PM
    #1
    RunAround88

    RunAround88 [OP] New Member

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    I have owned this Toyota Tacoma for about 4 months. Just this week it started blowing tail light fuses and won't quit. I do not run this truck off road,I use it mainly for transportation to and from the job. Any idea where to start looking for a problem?
     
    Bfar264 and ChadsPride like this.
  2. Feb 13, 2017 at 5:17 PM
    #2
    RickG

    RickG It seemed like a good idea at the time...

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    Got the tow package? Maybe some damage to the trailer plug or harness causing a short?.
     
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  3. Feb 13, 2017 at 5:18 PM
    #3
    Cb717cls

    Cb717cls Well-Known Member

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    Have you ever removed the tail lights?
     
  4. Feb 13, 2017 at 5:25 PM
    #4
    road2cycle

    road2cycle Well-Known Member

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    I'd remove the taillight assembly and look for any loose wiring. Remove the bulbs from the sockets and examine the sockets and bulbs. Look under the truck for any signs the wiring harness running from the cab to the rear has been compromised.
     
    TomTwo likes this.
  5. Feb 14, 2017 at 4:44 AM
    #5
    topcathr

    topcathr Well-Known Member

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    You can replace the fuse with a light bulb or an old seatbelt buzzer. when you find the short the light will go out.........open the sockets and remove the bulbs
    check the towing plug if you have one. good luck.....
     
  6. Feb 14, 2017 at 4:57 AM
    #6
    Hondah

    Hondah Revelations 6:8

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    Just a little info; there is usually electrical grease that's used where the bulb connects. If its absent, then it can cause the bulb to short out. If you replaced a few of them, I'm sure there is none of that grease in the location.

    For reference, I had an old chevy that did the same thing your describing, I put that grease in there, never have a problem again.

    Just a thought, hope you get it sorted out!

    https://www.amazon.com/Permatex-22058-Dielectric-Tune-Up-Grease/dp/B000AL8VD2 <----link for reference to product.
     
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  7. Feb 14, 2017 at 11:16 AM
    #7
    hladun

    hladun Well-Known Member

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    Sounds like a loose wire causing a short. Any aftermarket wiring mods? If something has been removed the normal practise is to just cut wires and leave them hanging. Crappy workmanship.
     
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  8. Feb 14, 2017 at 11:44 AM
    #8
    road2cycle

    road2cycle Well-Known Member

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  9. Feb 14, 2017 at 1:31 PM
    #9
    Pork Chopper

    Pork Chopper Well-Known Member

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    Too much dirt/grime on the connectors can also cause it short.
     
  10. May 14, 2018 at 10:10 AM
    #10
    Kidwidataco

    Kidwidataco Yes, my avatar is a real car.

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    Mine started doing this too. After I switched to led. But the first bulb lasted about 5 months before it blew, now the second lasted about 2 weeks. The 3rd lasted a day
     
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  11. May 16, 2018 at 8:43 PM
    #11
    TheDoctor9257

    TheDoctor9257 Well-Known Member

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    Had the same problem. The harness that connects to the tow connector was shot. And very dirty...
     
  12. May 17, 2018 at 6:56 AM
    #12
    Canufixit

    Canufixit Well-Known Member

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    Which fuse/amperage is blowing?? Is the blown fuse "vaporize" or just burned open?

    I'm looking at a 2006 wiring diagram. Remember to check the 3rd stop light on your cab. You may want to pull this to inspect as well.

    In summary - the power runs through a 10A brake fuse to brake switch on top of brake pedal. Then it branches to two places - the VSC/brake control relay which I'll ignore for now - and also from the brake switch directly to the two rear stop lights AND the 3rd stop light. 10a is a decent amount of power so I'd be looking at for a wire shorting to frame.
     
  13. Jul 18, 2018 at 11:30 AM
    #13
    68/bushman

    68/bushman New Member

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    it been doing that to me burn my fuse. since I cut off my towing Plug .because inside was all rusted out . I even unplug my harness just before the y .and I still burn fuse. any suggestion
     
  14. Jul 18, 2018 at 11:34 AM
    #14
    CouchlessPotato

    CouchlessPotato Handcuffed to steering wheels still won firefights

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    You don't buy a truck for its fucking fenders!
    2.5" lift w/35's
    Put a bigger fuse in it!:bananadance:








    Jk don't do that its a bad idea, check the wiring for the lights, could be a bare wire touching the frame somewhere.
     
  15. Jul 18, 2018 at 2:41 PM
    #15
    Canufixit

    Canufixit Well-Known Member

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    If it's the trailer wiring - I just but new trailer wire bundle and re run new wire. USe the old wire to pull the new wire flat through. Which fuse in blowing ??
     
  16. Feb 3, 2019 at 12:44 AM
    #16
    Bfar264

    Bfar264 New Member

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    OP, what did the problem and solution end up being? Having Same issue on my 2007 tacamo. Fuse just blows everytime. Brake light and turn signals work fine, but not tail light.
     
  17. Feb 3, 2019 at 4:43 AM
    #17
    badzook

    badzook Member

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    If you have a Towing Package.... Put a test light in place of the blowing fuse. It should light up if there is a short.. Then, Un Plug the Trailer Plug Connector near the spare tire... If the light goes out you have have found the short. If not Keep Looking.. Unplug each tail light one connector at a time.... I have seen bad light bulbs blow fuses.. The Filament leans over internally causing a short... (ie. Made in China Bulbs and YES Toyota Uses Chinese Bulbs from the factory. I almost fell over when changing my Headlight on a 2018 4Runner and it found was made in China...Damn it.. makes me wonder what else is on that truck I need to worry about.. ) ...

    I do have a more drastic and dangerous method to find shorts but will save it for later...

    Please post back and let us know what you find..
     
  18. Feb 3, 2019 at 5:31 AM
    #18
    JRVfromDVT

    JRVfromDVT Well-Known Member

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    If you have an aftermarket bumper that required different plate lights check those too. Had the same problem a month ago and a worn down wire going to the plate lights was the culprit.
     
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  19. Feb 3, 2019 at 6:03 AM
    #19
    Jethro 2.0

    Jethro 2.0 Well-Known Member

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    On my third gen I had a similar issue with constantly blowing fuses after I was at the boat launch pulling my boat out and didn’t have my trailer wires unplugged while the trailer was submerged. I had LED bulbs in the license plate lights and after chasing the issue I determined that one of those bulbs was fried and causing a short. I’d vote for a bulb issue somewhere causing a short like others have suggested. Get some spare fuses and start unplugging stuff and re-plugging in stuff to chase down the issue. Good luck!
     
  20. Aug 22, 2019 at 4:36 PM
    #20
    GregoryS10

    GregoryS10 Well-Known Member

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    Anyone got any other ideas what to unplug to check? I've done both tail lights the trailer wiring harness, the backup lights by the license plate, even did the DRLs (not sure if that even has anything to do with it but it blows when I flip the DLRs on)??
     

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