If you come by, we have a tester that you can use to test the vehicle that's towing the trailer. This will tell us if the issue is in the vehicle or the trailer. If it's the vehicle, it could be a fuse depending on what vehicle you have. If it's the trailer, it could be a bad ground. But stop by, there is no charge to use the tester. :)
Could be it plug or a fuse
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