This is just a public service post. I just wired the plug in for my 4 pin plug on my trailer and it was easier and cheaper then I thought. Harleys are set up with the brake and blinkers seperate so if you buy just a simple trailer with a 4 pin plug and you don't want to splice or cut your wiring harness you can go to open road outditters and they have a whole set up for $144.00 but I only bought the H-D pass thru harness for $44.00 and a simple 4 pin plug from the auto parts store,plus I already H-D Run-Turn-Brake controller installed. I plugged the H-D pass thru harness into the Bike harness after the Run-Turn-Brake controller and I did not need the 5 to 4 wire converter at all. Just thought I would try to save your guys some cash that can used for chrome. Plus when I don't need the trailer plus I just remove the seat and unplug the wiring hrness and take out the Pass thru hraness,plug the wiring hraness and I am ready to go,no loose wires hanging around while I'm not using the trailer.Don't let someone try to sell something you don't need.

 

Have you had any problems with your electricial on your bike using this wiring setup
I have the same Run-Turn-Brake controller installed. on my 2007 ultra and I am getting ready to wire it up to pull a trailer

Thanx for any update

 

JohnnyP was wondering where you got the H-D pass thru harness is it after market
THanx Again for any help

 

There is a 4 pin blank connector with a rubber cap under my seat is that what you pluged into? I need brake , run and ground for a tour pak led rack I will be installing