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The 2009-2014 Ford F-150 was introduced for the 2009 model year as an update of the Ford full-size truck platform.

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trailer running lights not working at plug on truck

which fuse do i check?

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Daleo Kelso this will only work if your truck has the trailer towing package. If it has been wired aftermarket, you'll have to dig a bit for it. For the truck equipped with the package:

Fuse F31 will be for the parking lights on the trailer connector and Fuse F58 is for the trailer connector backup lights.

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Look under the lid of the fuse box. Should tell you.

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Check #67 under the hood behind radiator. There is a fuse box there. I had same problem. It's a 20 amp blue 1cmx1cm square style with clear window at top. A simple continuity test will tell if it's bad.

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trailer is working good now.


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Dale Kelso will be eternally grateful.
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