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Mike_P_'s avatar
Mike_P_
Explorer
Feb 04, 2021

No Power

New to me E450 C Class
Not getting power to the rear bumper for a trailer wire plug in.
Wiring in the underside rear does not look disturbed.
Havn't found the fuse box yet to check for a blown fuse.
Any other suggestions other than the fuse?
TIA, Mike
  • Mike P. wrote:
    Unit is a 2006 Born Free
    Getting no power to the rear receptacle in the bumper.
    Just want the brake, turn and running lights to work for my small trailer.
    According to the Ford book that came with the unit new, I'm not sure what fuse it is that I should look for?
    Mike


    There will be a relay and fuse for EACH of those items.

    Found another post on a different website with similar issue as yours for 2006 E450..

    You can view that HERE

    Specifically from that thread is the locations of the fuse boxes and relays HERE

    HERE is a Internet search using your information that may yield additional help.

    You may also need to double check the wiring at the rear to make sure it is plugged into the wiring harness since you have nothing at all.
  • Does the RV's brake lights, and rear turn signals work? Do they also work when tail lights are on? (when the headlights are on)

    If not I recommend chasing that down first. Fixing that may fix the trailer connector.
  • Unit is a 2006 Born Free
    Getting no power to the rear receptacle in the bumper.
    Just want the brake, turn and running lights to work for my small trailer.
    According to the Ford book that came with the unit new, I'm not sure what fuse it is that I should look for?
    Mike
  • Model yr of the chassis?

    What "power"?

    Stop/Turn?

    Running lights?

    Backup lights?

    Brake controller?

    Charging line?

    Can make a difference..

    I am going to assume your looking for charging line power, correct?

    Ford puts a relay in line with the charge line, relay only powers the charge line while the ignition is on (IE engine running). They also use separate relays and fuses for the stop/turn, running lights and backup lights for the towing connection.. Prevents shorted trailer wiring from turning off your vehicles lights by accident.

    Typically on Trucks the towing relay and fuse box will be under the hood area.. Chassis and van locations may vary..

    Newer Fords (2019 and up) now use a solid state "smart" towing module that controls those functions, unsure where that puppy is or the fuses but for the charge line, to get 12V power the engine not only must be running but you must put your foot on the brake and put it into gear.. Supposed to stay on until you turn ignition off and then do that gyration all over.. Not sure what smart idiot came up with that gyration but it is a stupid one for sure..

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