Restoring Rusty

[Palf70Step]

Originally Posted by Gregski

Correct but those grounds go to the front marker lights, there are no black ground wires going to the side marker lights.

Yes it uses the grounds thru the turn signal/park lampo on the front. When 12V for park lights is run thru the brown wire, it goes back to the front lamp thru the blue, then to ground. When turn signal is on, the blue line becomes the alternating 12V feed, and interrupts the ground that was in the side marker blue feed (thus it blinks). Took me a while to figure out that the front was the ground, but still not sure if all the science behind it is set in my mind yet.