89 Vic-Tailights

Rear running lights stopped working. Brake lights are ok, replaced tailight, license plate, trunk, hood and one front headlight. Replaced all the fuses too. Anyone have any ideas?? Thanks

Are the front parking lights working. If yes start looking at the wiring harness on the drivers side up on top of the wheel well, then move forward to the B pillar and finaly under the dash to the switch. If the front are not working start at the switch.