How to Wire 7-Way Trailer Connector On Trailer with Mix Match Wire Colors

Question:

I have a jetter used for plumbing and I have a 7 pin that needs wiring, Ive seen diagrams of how the wires should go but my problem is I have 2 brown, 2 yellow, 1 white, 1 red and 1 green wire which I have not found any diagram with that wire color set up. It is just splicing the brown and yellow with each other and having empty slots on my pin?

asked by: Kyle R

Expert Reply:

In regards to wiring a new trailer connector on a trailer like the 7-Way Molded Trailer Wire Connector part # H20043, you can't always just match wires by color. The reason for this is that not every trailer manufacturer uses the same color wires and they could have been replaced by a previous owner at one point as well. Therefore, in order to find out which color wires go where you must test them by applying power to each and seeing which circuit it illuminates. There is a diagram that comes with the 7-Way Molded Trailer Wire Connector which you can then match up once you have this info. In order to attach the wires I recommend using a mix of part # DW05745-5 and part # DW05744-5.

I have attached a help article with some common wire colors as well but this is just a guide.

expert reply by: Conner L