New truck, led backup lights?

Discussion in '13th Generation F-Series : 2015 - Present' started by Dawgfan54, Jan 7, 2017.

  1. Dawgfan54

    Dawgfan54 Full Access Member

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    Been a long while since I've posted. Got a new truck today. Went to install some knock off ridgid looking lights under the bumper to toss out some light when I'm backing up. Tried wiring them to the reverse bulb in the taillight and the truck picks up on the voltage and won't send power.

    I then read on some forums that the middle wire in the towing 7 pin is the wire for auxiliary lights for your trailer. Spliced into that and still nothing.

    The older trucks were easier to work on with less safety features and computers.

    What's going on here?

    My truck is a 2016 I'm trying to do the same thing in this photo but to my 2016.

    [​IMG]
     
  2. Roush PSD Interceptor

    Roush PSD Interceptor Straight Piped Diesel Staff Member

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    Thats right, hot on the center pin of the 7 pin towing plug in reverse.

    What color wires do you have
    on those knock off back ups?

    If it's black and white the white is ground on led and black is +

    Good clean ground where you
    mounted them?

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    Last edited: Jan 7, 2017
  3. ak_cowboy

    ak_cowboy Penguin Hunter

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    Didn't Chris have this problem too?
    Did you use a relay from the reverse wire to trigger the lights?

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  4. Roush PSD Interceptor

    Roush PSD Interceptor Straight Piped Diesel Staff Member

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    I know on my friends 2012
    F350, I made a 7 pin trailer
    plug for his Ranger bass
    boat it has back up dock ramp
    lights and we never needed a relay
    to turn on three backup
    lights at the rear of that trailer
    using the center pin only.

    I'm thinking it's a ground issue.

    How bout it @Dawgfan54?

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  5. Roush PSD Interceptor

    Roush PSD Interceptor Straight Piped Diesel Staff Member

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    Just doesn't make sense, 7 pin trailer plug on newer 2012
    and up F150's need relays to turn on led lights?

    Many newer trailers have led lights as the factory option.
    Ford engineers want their customers to have 7 relays on a
    trailer plug to transfer power to the 7 different functions
    needed by a trailer ???

    Edit: 6 excluding ground.
     
  6. Dawgfan54

    Dawgfan54 Full Access Member

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    weather turned rainy and cold, haven't checked the ground yet. The led lights have red and black wires and I've used them before on the old truck. The location for the ground that I used was the bolt with an existing grounded wire so I'm fairly certain the connection is sound. The coloring on the trailer pin for me has a grey wire with a purple streak down it.
     
  7. Roush PSD Interceptor

    Roush PSD Interceptor Straight Piped Diesel Staff Member

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    I'm seeing blue with a white
    stripe is reverse lights that
    goes to the factory bulbs.

    If you probe the gray with
    purple trace while truck is
    Scotch blocked on tires,
    parking brake on, key on
    in reverse with a led type
    tester not a test light bulb,
    are you getting power?

    Checked the fuse for that backup circuit?

    You may end up using a relay
    Triggered by this backup wire,
    There should be a constant battery
    Hot in that 7 pin for charging an
    RV battery.

    [​IMG]

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    Last edited: Jan 7, 2017
  8. Roush PSD Interceptor

    Roush PSD Interceptor Straight Piped Diesel Staff Member

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    I still think it ridiculous
    One needs a relay to transfer power from a 7 pin trailer plug wiring to run additional lighting.

    Normally one just plugs in
    even a huge horse trailer
    lit up like the 4th of July
    no problem.

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  9. iowaredneck

    iowaredneck Administrator Staff Member

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    Forget the lights let see pics of this "new" truck
     
    Dawgfan54 likes this.
  10. Roush PSD Interceptor

    Roush PSD Interceptor Straight Piped Diesel Staff Member

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    LOL

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