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Turn signals come on when using brakes??

Discussion in 'Technical Chat' started by littledvl, Aug 4, 2011.

  1. Aug 4, 2011 at 6:16 PM
    #1
    littledvl

    littledvl [OP] ride BMX!

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    Ok, this started last night while driving to the store, I noticed everytime I hit the brake the left turn signal light in the dash came on, I assumed I had a left brake light out..

    After getting home I had my gf hit the brakes, there was no brake light out or any light for that matter. I did notice the left front and rear turn signal lights came on when hitting the brake.

    I been told a short in the 7pin would cause it but I unpluged it and it still does it. Both tail lights are stock, only had the passenger one out to replace a bulb.


    How would I go about finding out whats causing it?
     
  2. Aug 5, 2011 at 7:43 PM
    #2
    littledvl

    littledvl [OP] ride BMX!

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    Bump

    Pulled the tail light out, checked everything, still does it.

    Dealer cant look at it until the 16th..
     
  3. Aug 5, 2011 at 7:50 PM
    #3
    Hardwater

    Hardwater Well-Known Member

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    Is your turn signal switch going 100% back to center? Other than that, I would check all your grounds, a bad ground can cause some strange things.

    I assume your seeing the signal come on in the dash as well.. I am not 100% familiar with the Tacoma's wiring, but usually there is a plug near the rear axle that branches out to your tail lights and trailer harness. disconnect here and see if it still does it.
     
  4. Aug 5, 2011 at 7:52 PM
    #4
    NelsonTacoma

    NelsonTacoma This is my derpawayinator!!!!!

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    Definetly sounds like a shorted wire. I'll look up a wiring diagram and see what I can find.....
     
  5. Aug 5, 2011 at 7:58 PM
    #5
    littledvl

    littledvl [OP] ride BMX!

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    Turn signal switch is centered, and I tried unplugging the trailer harness with no luck. Ill check grounds tomorrow


    Thanks
     
  6. Aug 5, 2011 at 7:58 PM
    #6
    NelsonTacoma

    NelsonTacoma This is my derpawayinator!!!!!

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    Do you have trailer wiring? I've heard on the 1st gens that trailer wiring can cause this same issue. Might want to start there. There is a 30amp fuse and a relay for the towing circuit in the engine compartment fuse block, pull those out and see if it does it.

    Edit: Just re-read first post and you already tried this......
     
  7. Aug 5, 2011 at 8:10 PM
    #7
    NelsonTacoma

    NelsonTacoma This is my derpawayinator!!!!!

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    Here's the wiring diagram.

    [​IMG]

    Maybe try pulling the relay or fuse for the tail lamps and see if it goes away. If it does then you know it's in the rear. Or check the ground on the frame rail.
     
  8. Aug 5, 2011 at 8:35 PM
    #8
    littledvl

    littledvl [OP] ride BMX!

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    +1 ^^

    Awesome, thanks for finding the diagram.

    ill look over it tonite and start tracking things down tomorrow if it aint raining.
     
  9. Aug 5, 2011 at 8:37 PM
    #9
    NelsonTacoma

    NelsonTacoma This is my derpawayinator!!!!!

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    Anytime. Let me know if you figure it out. :):)
     
  10. Aug 5, 2011 at 8:51 PM
    #10
    gtrotter

    gtrotter Well-Known Member

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    Electrical gremlins! I wish you the best of luck.

    My first car, 93 Chevy Lumina, had one. Every time I hit the left turn signal AND turned left, the car would die? Haha, just stopped using the left turn signal.
     
  11. Aug 7, 2011 at 9:00 PM
    #11
    littledvl

    littledvl [OP] ride BMX!

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    Well, I checked everything I could saturday, still did it. Today on the otherhand it never did it once so im not sure what to think, I guess ill just wait and see if it comes back. Seems like its something loose somewhere..
     
  12. Aug 7, 2011 at 9:12 PM
    #12
    97yota4wd

    97yota4wd Well-Known Member

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    this same thing happened to me, it was cause a tire was shorted
     
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