HBJBIRDExplorerApr 17, 20197 PIN WIRINGReplacing my 7 pin plug on my enclosed trailer. Wires from the trailer are: 2 red, 1 brown, 1 yellow, 1 black, 1 green. The 7 pin extension has: 1 red, 1 brown, 1 green, 1 yellow, 1 black, 1 blue, 1 w...Show More
downtheroadExplorerApr 17, 2019Yellow should be left turn indicator.....check that.Stick a multi-meter on the yellow coming out of the truck end.