TM 5-5420-226-20-1 SvmDtom-62 DETAILED TROUBLESHOOTING PROCEDURE r– ‘+ SUPPORT SYSTEM -  VEHICLE LIGHTING (Continued) Check    front    accessory harness (CKT   23)   at  bulkhead disconnect for   electrical power. Second Technician (Operator’s Station) l   Set   MASTER BATTERY switch OFF Second Technician (Rear Grille Doors) l First l First l l Connect rear accessory harness (CKT 23) taillight assembly. to   right and    Second Technician (Rear Grille Doors) Install transmission shroud (page 9-6). Technician (Commander’s Station) Displace front   accessory harness connector (CKT 23)  at bulkhead disconnect (page 10-269). Connect red   probe    of  meter to   contact C   (CKT 23)   of front accessory harness connectol ground. Second Technician (Operator’s Station) l l First l Set   MASTER BATTERY switch Press and hold    brake pedal. and    black probe to ON. Technician (Commander’s Station) Check if  meter indicates 18  to   30   volts   dc   while    brake pedal is   pressed. Does    meter indicate 18  to   30   volts    dc? o- T +0 TO   VEHICLE GROUND — ^——–\ < J — ‘v^\ ( W5’” BULKHEAD DISCONNECTS AT   COMMANDER’S STATION ~ harness for   bent/broken connector contacts or   loose CKT   23   wire   at   rear   of connectors. l   Repair    connectors if  defectjve (page 10-298). l   If  connectors are   not defective, notify support maintenance of   a  defective rear   accessory harness. l   Install    front    accessory harness connector at bulkhead disconnects {page 10-270). TA   107309 — (L 4-620 ,