1.CHECK REAR SIDE MARKER LAMP OPEN CIRCUIT

1. Turn the ignition switch OFF.
2. Disconnect the rear combination lamp connector and the rear side marker lamp connector.
3. Check continuity between the rear combination lamp harness connector and the rear side marker lamp harness connector.

   Rear combination lamp | Rear side marker lamp | Continuity
   Connector | Terminal | Connector | Terminal
   RH | B240 | 5 | B372 | 1 | Existed
   LH | B57 | 5 | B371 | 1

Does continuity exist?
YES>>GO TO 2.
NO>>Repair the harnesses or connectors.
2.CHECK REAR SIDE MARKER LAMP GROUND OPEN CIRCUIT
Check continuity between the rear combination lamp harness connector and the rear side marker lamp.

Rear combination lamp | Rear side marker lamp | Continuity
Connector | Terminal | Connector | Terminal
RH | B240 | 3 | B372 | 2 | Existed
LH | B57 | 3 | B371 | 2

Does continuity exist?
YES>>Replace the rear side marker lamp assembly.
NO>>Repair the harnesses or connectors.