Got an alert that my rt backup light was burned out. Replaced it, still NG. Turns out there's no voltage at the connector (left backup light is OK). It's not the crimp at the connector, as I pierced the insulation with a needle tipped probe, and no volts. Before I start tearing out liners trying to follow the harness, anyone have any ideas? Obviously its not as simple as the circuit for the backup lights simply splits in a harness, as the car "knows" which light is not functioning. Thanks