New to this forum, been searching all over the place for info on how to fix my rear window wiring issue. Recently bought a 1979 bronco and I've been having the typical rear window issue, I tested then motor and it's working, replaced the interior window switch, replaced the starter solenoid accessory safety relay but still nothing. Checking the connector at the interior relay and I'll have 12 volts 1 minute and then less than 5 volts the next time I check. Checking the wiring at the tailgate and I only have power at the black and white but not the purple green or purple blue, the black and white also fluctuates. The new safety relay also fluctuates. Anybody have any idea what it could be?