2018 f150 trailer light module
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More Turbo
Joined: Nov 2004
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From: Western Canada
2018 f150 trailer light module
I have a 2018 F150 and both the 4 pin and 7 pin I have only signals and brake lights the lights on or running lights do not work but they use to.
Last November we rented a uhaul 6x12 enclosed trailer and we got pulled over in Montana around 1 a.m., the officer said we had no trailer lights which was news to me. Upon getting to a uhaul location in the morning the tech there said there was a ground issue. As he dragged a chain across the tongue it was giving off small sparks (still hooked to the reciever), I think it may have fried something in the module under the dash.
The actual trailer wiring had multiple splices along the tongue. Anyone shed some light or your thoughts?
Last November we rented a uhaul 6x12 enclosed trailer and we got pulled over in Montana around 1 a.m., the officer said we had no trailer lights which was news to me. Upon getting to a uhaul location in the morning the tech there said there was a ground issue. As he dragged a chain across the tongue it was giving off small sparks (still hooked to the reciever), I think it may have fried something in the module under the dash.
The actual trailer wiring had multiple splices along the tongue. Anyone shed some light or your thoughts?
Thread Starter
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More Turbo
Joined: Nov 2004
Posts: 725
Likes: 0
From: Western Canada
As a note. During that trip I ran a jump wire from the battery to the trailer wiring and tapped into the running lights wire to give constant power to them, when I would stop for any length of time I would just undo the wire at the battery.
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hillcountryflt
2015 - 2020 F150
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Oct 8, 2025 06:10 PM
