re: Help with trailer lights

quote:

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How is that corrected?

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If that's the case and I'm not 100% sure it is, just going by what you say. You'll have to backtrack the connections and see which one looks odd or tests odd under a load.
If you can get another vehicle with working hook ups to try out then it's a no brainer for sure.
Trailer lights/power problems suck. I'm about to revamp my boat with a civilized wiring method.