verslagen1 wrote on 06/19/12 at 09:01:22:You gotta remove the side rails to get at the wiring.
I recently removed the stock rear turn signals and installed replacement turn signals using a 7" "U" bracket on the license plate holder. Once you remove the seat, it's easy to see where the two wires feed to each rear turn signal. I realized I'd have to lengthen the wires, so I just cut the original wires and pulled them out, without removing the side rails, added about 30" of 20 gage and ran all 4 new wires down the center hole in the fender with the rubber grommet. I had to wack about 1/3 of the grommet in order to give me the added space for the additional 4 wires.
The underside of the rear fender has a support bracket which has room to accommodate the 4 additional wires and keep them off the tire. I cut the clip end off a 9" wire tie, electrical taped the + & - wires to it and slid them through the support bracket, two wires at a time.
Believe me, if I can do this modification, ANYONE can!