if the case is sparking when touching the frame, i think there's a chance of a positive wire shorting out inside the case or against the frame somewhere. In theory, if the instrument panel up front is correctly connected to the frame (grounded by fasteners) and a negative wire runs from it to the engine panel and that's grounded, then the ground circuit would be complete. Given the state of yours, i'd add a ground strap or wire from the rear swingarm to the front frame.
My instrument panel is not connected at the moment and i had dead lights until i realized that the ground circuit was not carried anywhere else from front to rear. as soon as i grounded the battery to the front frame, i had lights. Even though when i connect everything properly i know i'll have a good ground, i still am going to add a strap from the rear to the front.
as far as the rear light goes, i think the 3 wires = ground, 12v on/running (dim), 12v brake on (bright)
Last edited by x-bird; 02-15-2012 at 08:55 AM.
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