Reverse light wiring issue you listed... I don't have that brand but my trailers reverse lights went out, then only one taillight would work. LED style. After completely rewiring the whole trailer and replacing the light assemblies and even having the Dodge dealership replace the trailer connection. It still did the same thing. I ended up finding that it was two bad grounding points. The wiring harness ground to the trailer up by the tongue and the light assembly ground back by one of the lights. Dremel tool with a wire brush on it and five minutes and not a problem since.

For light issues sand down your ground points real good. Mine looked fine and couldn't see any corrosion at all.

Might help.

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