My 88 K5 Silverado has issues. The power lock switch does not work on the pass side, and the Pass window will not work. So I tested the regulator plug with a test light and tried both drivers and pass window switches for the pass window and I get nothing. I can get the pass door to lock and unlock on the drivers side switch and the drivers window works so it cant be a fuse. Is the switch a common issue? Any other ideas? Thanks.

 

try a new ground on the pass side from the switch. i had a buddy with and old burban and the harness lost ground connection so he was able to just add a short lead to ground on the door and it worked....may work for you.

 

Thanks for the input but if it was the ground the test light should still light up. I tried a few ground locations with the light and never got it to light up. The light also tested good. Guess I will have to follow the power wire when I get time.