Originally Posted by SS396CV
Iggy, I assume you checked both sides to see if they flash. On mine the left side flashed the right didn't. What I found is that Forest River cut the turn signal wire to the lamp and ran a ground from the lamp to the frame instead. The marker light worked the turn signal didn't.
Both flash if I turn right or left on the specific side. Your should both work that way.
If you have one not flashing check the socket. May be corroded as it was on Ramairs rig.
Too much water over time corroded the bulb socket connections.