I have an issue with my 04.
Over the winter the left blinker would Sometimes blink fast. If you pulled down on the handle a little, it would blink normal. Then the interment problem went away.

Well last week the problem came back but ALL the time. Both my front and rear lights work, but the left side is fast. I figured it was the Multifunction switch, so I bought anew aftermarket one. Put tha in tonight, and still have the same problem.

Suggestions?

 

Ground issues on the multiswitch?
Blinker module is shot?

 

What is a blinker module?

 

Found it. Bad ground at the taillight. Someone tapped into it for the cap wiring with one of those scotch locks JUNK and it corroded the wire. It was back feeding thru the running light to make a circuit and it was not as bright as the other taillight. Cut all that BULL S#IT out and put a heat shrink butt connector In. Problem solved

 

glad you found your problem. I hate when people half *** things