B-4B Code L207 With L202 or L204

Because OSM # 7 is the only OSM with three address pins, it is possible, however rare, for OSM # 7 to lose power to two address pins and have the same address as either OSM # 2 or OSM # 4. When the Body Control Module (BCM) sends a command on the data line to OSM # 2 or OSM # 4. If such an addressing failure exists, a lighting fault results because two OSM's are responding to one BCM command. Also, when the BCM sends a command on the data line to OSM # 7, during such an addressing failure, a lighting fault results because there isn't an OSM available to respond to the command. The table below lists the Computer Control Driver Information Center (CCDIC) messages and symptoms of these conditions.