I have a 88 chevy stepside and the other day the tail lights stopped working. The really weird part is that I have brake on the passenger side only but when the headlights/running lights are turned on the brake lights dont work at all. The running lights dont turn on either. Everything works great in the front but not in the back. I tested the voltage at the connector in the back underneath the truck ad i have power for the running lights and brakes but doesnt get up to the lights. Today I ran new wire from the lights down to the connector where I have power but I have the same issue. If anyone has any ideas please let me know. Thanks