Newer turn signals on HD have a ground wire. Black is ground, purple is positive.
On the older ones, the single wire is positive, and the lamp grounds via contact when mounted. You can see the ground in the socket routes to the inside of the lamp housing.
Football Season is over....
“When the going gets weird, the weird turn professional.” ~ Hunter S. Thompson~
Praise the Lowered!
11 year A.M.A. member.
4 year PA ABATE member.
RIP Rick Massey: AKA-Rubberdown. Godspeed, 02-02-12.