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Trailer blinker passenger side not working

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Petey786, Aug 23, 2022.

  1. Aug 23, 2022 #1
    Petey786

    Petey786 Bobtail Member

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    Aug 23, 2022
    0
    I have a 2016 Freightliner Cascadia. For some reason the blinker on the back of the trailer on the right side doesn’t work. Brake light works fine but the blinkers don’t. I changed fuses on the truck and nothing. I know it’s not the trailer because it happens on every trailer I hitch onto. Would anybody have any idea what could be the problem? I’m gonna change the electric port connection to the truck and see if maybe a pin is making connections idk. Any advice would be greatly appreciated and helpful.

    thank you
     
    Petey786, Aug 23, 2022
    Petey786, Aug 23, 2022
    #1
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  3. Aug 23, 2022 #2
    circle h

    circle h Light Load Member

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    Oct 22, 2020
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    Get a test light an carefully probe the light connector on the truck with the wire disconnected and the right turn signal on. If you find it flashing you need a new wire. If not the wiring issue is deeper in the truck.
     
    circle h, Aug 23, 2022
    circle h, Aug 23, 2022
    #2
    tscottme Thanks this.
  4. Aug 23, 2022 #3
    Dave_in_AZ

    Dave_in_AZ Road Train Member

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    May 4, 2015
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    Check the relay for trailer right side turn. If that's not it, the contacts inside the cab chassis controller are probably no good. So you'd need a new cab chassis controller.

    Seen that movie. $2800 with popcorn.
     
    Dave_in_AZ, Aug 23, 2022
    Dave_in_AZ, Aug 23, 2022
    #3
    blairandgretchen Thanks this.
  5. Aug 23, 2022 #4
    Chieftains

    Chieftains Medium Load Member

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    Jul 18, 2021
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    It's a fuse up front driver side firewall. Check youtube for video.
    Replaced. I think 20fuse.
     
    Chieftains, Aug 23, 2022
    Chieftains, Aug 23, 2022
    #4
    baha Thanks this.
  7. Aug 23, 2022 #5
    Chieftains

    Chieftains Medium Load Member

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    Jul 18, 2021
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    Try this
     
    Chieftains, Aug 23, 2022
    Chieftains, Aug 23, 2022
    #5
  8. Aug 23, 2022 #6
    Powder Joints

    Powder Joints Subjective Prognosticator

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    6,734
    Sep 25, 2007
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    You know there should be a fuse in the box where the trailer pig tail plugs into the trailer, rather a breaker normally.
     
    Powder Joints, Aug 23, 2022
    Powder Joints, Aug 23, 2022
    #6
  9. Aug 24, 2022 #7
    FYI

    FYI Bobtail Member

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    Aug 26, 2019
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    Check your truck receptacle or your truck/trailer cord with a test light. Since it follows the truck I'd say that is the most common problem area.
    [​IMG]
     
    FYI, Aug 24, 2022
    FYI, Aug 24, 2022
    #7
  10. Aug 24, 2022 #8
    Mr Bob

    Mr Bob Light Load Member

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    Mar 17, 2015
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    yup, i would start at the trailer plug and work forward after checking fuses.
     
    Mr Bob, Aug 24, 2022
    Mr Bob, Aug 24, 2022
    #8
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