No Power to 7-Way on a 2017 Ford F-550
Published 11/21/2018
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Question:
My question is I have a 2017 550 Ford diesel and i dont have power at the 7 way plug for the trailer on the aux wire! Everything else works fine! I would like to know what cud possibly be wrong with my trucks auxiliary wire!
asked by: Mark
Expert Reply:
I cannot say I have heard of this issue for the F-550 model but some of the F-150 models would only send 12 volt power to the 7-way while the vehicle is in gear. If you place the vehicle in gear while your foot is on the brake you can then have a friend test the 7-way with a circuit tester to see if it has power. If not you could also check the #27 fuse (30 amp) and #37 relay in the fuse box.
If all else fails you would need to run your own wire from the 7-way to the vehicle's battery with part # 10-1-1 (per foot) and part # PK54540.
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