B-4A Code L207 With L203, L205 or L206

Code L207 indicates loss of power to an address pin on OSM # 7. When OSM # 7 loses power to pin D, its address is the same as OSM # 3. Loss of power to pin E makes the OSM # 7 address the same as that of OSM # 5, and loss of power to pin F makes the OSM # 7 address the same as that of OSM # 6. When the Body Control Module (BCM) sends a command to an address on the data line and two OSM's try to respond, the result is a lighting fault. During such an address failure, when the BCM sends a command on the data line to the address of OSM # 7 (the misaddressed OSM), there is no response by any of the OSM's which also results in a lighting fault. The table below lists the Computer Control Driver Information Center (CCDIC) messages and symptoms of these conditions.