Preliminary Checks

1. If one side of front marker lamps is operating, check condition of bulb(s) that are not operating. If bulb(s) are good, LOCATE and REPAIR open in BRN (9) wire and BLK (150) wire.
2. If none of marker lamps operate, use the diagnostic procedures.
3. If at least one roof marker lamp is operating, check condition of bulb(s) that do not operate. If bulb(s) are good, LOCATE and REPAIR open in WHT (45) wire and BLK (150) wire.
4. If none of the roof marker lamps operate, use diagnostic procedures.