I'm having some bulb issues with a car I just bought. The headlights and turn signals work fine, but the corner lights don't. When you first turn them on, they take like 10-15 seconds to start lighting up, and even then it takes a few seconds to fully light. Once they have come on, you can turn them on and off with no problems. If you let them sit for a few minutes, the process starts over. Any thoughts?