Factory Trailer Wiring? - 1999-2013 Silverado & Sierra 1) 12V power - along with powering 12V trailer items (inside lights, furnace fan, etc.) can this also be used to "trickle charge" an RV/marine battery on the trailer during towing? That's how my trailer is currently wired. 2) Right turn signal - should I assume a wire is cut somewhere, or am I looking for a fuse (truck signal light works fine)?
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