no turn signals or brake lights

Discussion in 'Wiring' started by campingranny, Jul 13, 2018.

  1. campingranny

    campingranny Member

    110
    13
    Feb 14, 2007
    Elizabeth, PA
    If anyone out there knows how to help me I would appreciate it. My running lights work but turn signals and brake lights do not. They worked last year. but when I connected up this spring they are not working. I got a tester and the 4way works just fine on the van. Will I have to take this somewhere to get diagnosed? What could have happened.
     
  2. sleach

    sleach A short run will get you within walking distance.

    645
    116
    May 17, 2014
    First thoughts:

    Dirty connections. Clean all the contacts on both sides of the tow vehicle to trailer connector with tooth brush and rubbing alcohol.

    Bad ground(s). Clean connection(s) from lights to trailer frame. Clean connection from frame to four or more way connector. Clean connection from tow vehicle side of connector to frame of tow vehicle.
     
  3. WrkrBee

    WrkrBee Active Member

    512
    195
    May 23, 2018
    South Carolina
    Are we working with a 4 pin plug or 7 pin plug. Standard wire colors, for both plugs, are green for right brake / turn lights and yellow for left. Your ground is good since the running lights work. Check your wire connections after the trailer plug on the green and yellow wires.
     
  4. BikeNFish

    BikeNFish Well-Known Member

    1,393
    795
    Apr 24, 2017
    Maplewood, MN
    After you've checked your connections, check your vehicle fuses. Your vehicle manual will tell you where your brake light fuses are. There should be several trailer fuses in the fuse box.
     
  5. campingranny

    campingranny Member

    110
    13
    Feb 14, 2007
    Elizabeth, PA
    It is a 4 pin. I cleaned all the connections, got a drivers side turn signal and brake light none on other side. then I went to check the ground on the off chance it was rusty. well it was, as i was cleaning it it broke off. so now i have to figure out how to strip and reconnect it. Will a general auto garage be able to help or do I have to take it to a rv dealer. Thanks for your help.
     
  6. WrkrBee

    WrkrBee Active Member

    512
    195
    May 23, 2018
    South Carolina
    A garage should be able to help. I avoid RV dealers, since most will not work on it, if they did not sell it. A local handyman can help, too.
     
  7. jnc

    jnc Welcome from New Hampshire

    First goto Walmart and buy a cheap pair of wire strippers and fix that ground wire. Watch this Video
     
  8. campingranny

    campingranny Member

    110
    13
    Feb 14, 2007
    Elizabeth, PA
    SUCCESS!! I got the lights fixed. I stripped the ground wires with wire strippers like jnc said to do and reattached with new connectors, scrubbed the connections with toothbrush as per sleach suggested and used elec grease. Thanks for the guidance. I am now road safe.
     
    neighbormike and emoney like this.
  9. emoney

    emoney Well-Known Member

    686
    347
    Jul 7, 2018
    Great job!
     
  10. tombiasi

    tombiasi Well-Known Member

    4,636
    453
    Sep 1, 2012
    Northwestern New Jersey
    Good feeling to fix something isn't it.:)
     

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