I had the same problem, but only with my rear light. To crudely describe the fixture, there is a wheel attached to the rocker portion of the light. On either side of the wheel there are 2 flat connectors. When the switch is in the center position, it doesn't make contact with either connector. But as light is switched back or forward it hits a connector. What you may need to do is remove the unit up and 'gently' bend the connector back into place, and/or clean the connections with a pencil eraser. For you door lights it's the usual make sure that all of the connections are clean. My passenger lights were fine, but when my drivers side lights wouldn't turn on, I'd have to tap the switch. To fix this just take a small phillips head screwdriver and make sure that the screws on the switches have been tightend down (you'll see what I mean when you look @ the switch from behind). -Robert vin 6585