Anyone know why my dash voltage gauge drop only when my headlights lights are on and I turn my interior lights on?
Car running or not, same issue.
Side issue, my drivers side front directional don't blink, neither with hazards on. Replaced flasher and tried different bulbs, no luck. They do light up when lights turned on tho.
1983 Z28 with recent Vortec 350 swap.
Video here:

Thanks