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  1. #1
    Junior Member
    Join Date
    Feb 2012
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    2

    2007 F150 - No running lights when pulling trailer

    Anyone have any idea why I would have no runnning lights, when pulling my trailer. Brake Lights work Fine, as do Turn Signals. Problem is not with trailer as running lights worked when hooked up to different vehicle.
    Not sure if it is related, but the illumination light behind the compass/trip counter does not work either. Compass, trip gauge and low fuel indicator all still work, just no light!
    Vehicle is equipped with Trailer Tow Pkg.
    Hopefully it is just a fuse or relay.
    Thanks in advance for any replies!

  2. #2
    Super Moderator kozal01's Avatar
    Join Date
    Dec 2011
    Name
    Patrick
    Location
    West Michigan
    Posts
    822
    Youve got a ground or connection issue somewhere. what plug are you using the 4 pin or the round seven pin plug? Do the lights work once the trailer lights are unplugged from the truck?
    2005 F-150 Supercrew Lariat 4x4
    Salvage recovery
    Edge Programmer

    2001 Ranger 4x4
    Salvage recovery
    A few mods

  3. #3
    Junior Member
    Join Date
    Feb 2012
    Posts
    2
    Quote Originally Posted by kozal01
    Youve got a ground or connection issue somewhere. what plug are you using the 4 pin or the round seven pin plug? Do the lights work once the trailer lights are unplugged from the truck?
    Thanks kozal01 for the reply!
    I use the round seven pin plug. And no, the compass/trip odom. light does not work even when not hooked to the trailer. I never thought to try the 4 pin plug. I would need to use an adapter, but may try that.
    I also plan on going thru the fuses again tomorrow, and hopefully will find a blown fuse.

  4. #4
    Member Bothe's Avatar
    Join Date
    Jan 2012
    Name
    Scott
    Location
    Kitsap, Washington
    Posts
    97
    I bet it's a fuse. I had the same problem with my old truck's LED tailgate bar. The running lights would never come on, but i went in and found a blown fuse, replaced it and it started working after that.
    98 F150, Lariat, 4x4, 5.4l, Tow Mirrors, Straight piped, Police/Fire scanner, CB

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