On my truck, I currently have a just a regular old 4 pin wiring harness for trailers. My question is, does anyone have an directions to make a harness that will allow my 4 pin on my truck hook up to a 4 pin that is wired to a 7 pin plug to install on my truck. I know this is confusing as hell how I am wording it, but I am not sure how to explain it.
Basically I want to make an adapter like this:
4 pin-------wiring-------7 pin
I realize trailer brakes and that jazz won't work, but this will still allow me to hook up a trailer with a 7 pin plug on it to my truck and have lights. I am not sure how to make this adapter?
Any help with my confusing cluster of a post?