'85 C10, bought truck window regulators to speed up function of windows. Drivers side works fine. Passenger side works fine. Passenger switch on drivers side works fine in up mode, dead short on the down button that causes interior light to dim and stereo to restart (modern day single din). Wiring diagrams are confusing. New switch, but old switch does the same thing. I'd like to be able to run a jumper from drivers side passenger switch to the passenger side. Any ideas? I'm lost.