It's a 1995 Chevy Tahoe 4x4 with a 350. The rear blinkers don't work(fronts do), no rear brake lights(except the 3rd brake light at the top, it still works), no parking lights and no backup lights. Bulbs are fine and I checked all the brake/parking light fuses inside and under the hood. What could be the problem? Please help, I can't drive it at night because I don't want to get a ticket or get run over.