I just put on the 513's Wild 1 mini apes on my 08 SERK this week. I would guess that you have a poor connection on at least one pin, a poor ground will affect more items. I did not have to put any extensions so it was a plug & play for me. If you had to put extensions you may want to check continuity on each wire from the kit, should only take a few minutes (make sure there is no power when checking for continuity). I was disappointed with the quality and fitment on my bars. I have to cut a little off to make it flush on the left side. I had to use the optional kit to bring the 1 inch bar section to the the riser area which is set up for 1 -1/4. The kit consist of two pieces of knurled metal that are intended to sandwich the 1" bars, the bottom is notched for the wiring but unfortunately the metal bar stays tightly in place even when loosened to make adjustments. This could pinch or cut the wires if pulled to far. I decided to take everything apart and epoxy the two pieces and install two radiator clamps holding it tight. So far everything works as it should.
Take you time on electrical issues, there are a number of experts on this site that can solve just about anything.
good Luck
Ray G.