Since they do come on my first suspect would be plug and socket connection. I would clean both sides with some fine sandpaper and see if that helps. Next would be to look at my ground on the trailer.
When I changed my tail light and yard light I found they just pull the wire through the hole and leave it on a bare metal. That kind of short should blow a fuse so is unlikely.
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2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy
Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6
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