I just made an adapter to convert my 6 pin round on my truck to an RV 7 pin on a borrowed trailer. All of my trailers use the 6 pin round with brake controllers so I don't want to change everything to the RV - yeah, I know, someday or when I buy a new truck.
Made this thing up. No trailer brakes on this particular rig. I have running lights. I have brake lights. When I try the turn signal it makes my dash indicator blink really fast and I have nothing on the trailer. Same for right turn. 1994 Ford F150. Any ideas? Please notice, the brake lights work, same bulbs AFAIK. I don't really want to change the other guys"s trailer. I made one run without the turn signals, but I would like to figure this one out.