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Unknown plugs

5634 Views 10 Replies 6 Participants Last post by  Blue74, 
Blue74
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I was wiring up some back up lights on the rear of my 2013 F-350 Dually and saw these two plugs and was wondering what they are for. They are attached to the side of the trailer hitch. Ideas?

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I have them too on my 2016. I have to drill new mounting holes for them in my upgraded trailer hitch so they aren't just hanging there. I was also wondering what they are. Maybe trailer plugs for the 5th wheel/gooseneck trailer plug in the bed?
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I have both and still have those plugs. 6.2 though
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