1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Turn signal & brake light problems

Discussion in 'Audio & Electronics' started by nvsteve, Jan 17, 2020.

  1. nvsteve

    nvsteve TYF Newbie

    Posts:
    14
    Likes Received:
    7
    Joined:
    Mar 13, 2018
    Name:
    steve
    99 yukon, left side rear turn signal and brake light not working. Rapid blink, front signal only works. All right side work ok. Already replaced bulb and flasher. Any idea what the problem is?
     
  2. PNW VietVet

    PNW VietVet Supporting Member

    Age:
    67
    Posts:
    5,629
    Likes Received:
    4,373
    Joined:
    Oct 8, 2014
    Location:
    Oregon
    Name:
    Ron
    Sounds very much like a ground problem. I always have a 4 foot long section of 12-14 gauge wire with alligator clips on each end for times like this. Ad that as another source of ground to the bulb/socket holder at the left rear. You will need to remove that holder from the mount and check that. You may also have a power feed problem to it as well. Check all wires leading to the sockets. I don't know for sure but others will likely know if there is a junction box/connector at the frame area at the rear for all this as well.


    Plus, see below what Wes said.
     
    Last edited: Jan 17, 2020
    Big Mama and wjburken like this.
  3. Doubeleive

    Doubeleive Supporting Member

    Posts:
    11,278
    Likes Received:
    11,373
    Joined:
    Nov 7, 2017
    Location:
    Stockton, Ca.
    Name:
    Wes
    Make sure the bulb socket is clean, take a small piece of sandpaper and a screwdriver and clean up the socket contacts inside real good 95% of the time that clears it up.
     
    Big Mama, wjburken and PNW VietVet like this.
  4. nvsteve

    nvsteve TYF Newbie

    Posts:
    14
    Likes Received:
    7
    Joined:
    Mar 13, 2018
    Name:
    steve
    Just to close the conversation, the problem turned out to be the bulb mounting plastic plate. Got a new one from Amazon, $7.

    Tip, use a magnetized screw driver to remove the screws that hold the taillight assembly to the body
     
  5. PNW VietVet

    PNW VietVet Supporting Member

    Age:
    67
    Posts:
    5,629
    Likes Received:
    4,373
    Joined:
    Oct 8, 2014
    Location:
    Oregon
    Name:
    Ron

    Where it gets it's ground.
     
  6. Doubeleive

    Doubeleive Supporting Member

    Posts:
    11,278
    Likes Received:
    11,373
    Joined:
    Nov 7, 2017
    Location:
    Stockton, Ca.
    Name:
    Wes
    the tail light board's were known for going out on the obs trucks, especially on the Silverado's
     
    wjburken and PNW VietVet like this.
  7. wjburken

    wjburken Supporting Member

    Posts:
    4,050
    Likes Received:
    7,438
    Joined:
    Dec 26, 2017
    Location:
    Eastern Iowa
    Name:
    Wade
    Truth.

    The one on my dad’s truck has been replaced 3-4 times.
     
    PNW VietVet and Doubeleive like this.
  8. Squirrelsmith

    Squirrelsmith Full Access Member

    Posts:
    839
    Likes Received:
    598
    Joined:
    Jan 21, 2018
    Name:
    Kevan
    Those tail light boards are so hoakey. One of mine stopped working. I looked at that sucker for a while and started peying up all the contact points to get better contact and it started working again
     
    Doubeleive and PNW VietVet like this.
  9. east302

    east302 Full Access Member

    Posts:
    876
    Likes Received:
    365
    Joined:
    Dec 21, 2016
    Location:
    Mississippi
    Name:
    east302
    So I guess I’m not the only one that has a small collection of screws forever lost into those holes.

    Awesome design.
     
    Doubeleive likes this.

Share This Page