1999 OBS Tahoe. This is my second light switch. I replaced it this past winter. Anywho, the orange wire on top on the far side on the harness keeps burning up, causing the prong on the switch to become black, making my running lights & dash lights to go out. Tonight the wire fell off the harness. I afro engineered it to get home, but would like to find the cause. The truck had foglights wired up by the previous owner, I had them plugged in, and just recently unplugged them thinkin that might be the culpret. I also have xentec 10k hids..