You probably have a ground problem near the blinker. I am attaching grounding points for you to check to make sure they make a solid metal to metal contact.
The other possibility is the multifunction switch but you should check the grounds first. The, "1of2" goes on the left of the complete diagram and you line them up by the numbers next to the wires.
Images (click to enlarge)
Thursday, February 7th, 2013 AT 2:07 AM