1994 GMC Yukon V8 Four Wheel Drive Automatic 134000 miles
The tail lights don't light up with the headlights on. They work when I push on the brake pedal and the backup lights work. I replaced all the bulbs and put new cicuit boards in and I also checked all the fuses " there good" Then I looked at the wires and nothing seems to be wrong with them. After checking the fuses and wires, replacing the circuit boards and bulbs they still don't turn on when I turn the headlights on. Can you help me?