DETAILED TROUBLESHOOTING PROCEDURE T SUPPORT SYSTEM - VEHICLE LIGHTING (Continued)

TM 5-5420-226-20-1 ( Symptom-66 DETAILED TROUBLESHOOTING PROCEDURE T SUPPORT SYSTEM - VEHICLE LIGHTING (Continued) Check rear acceeaory harneee connector (CKT 21) at left taillight for electrical power. Second Technician (Operator’s Station) l Set MASTER BATTERY switch OFF. First and Second Technicians (Rear Grille Doors) l Remove transmission shroud (page 9-2). . First Technician (Rear Grille Doors) l Disconnect rear accessory harness connector (CKT 21) from left taillight assembly. l Set multimeter to measure 18 to 30 volts dc, or use STE/ICE Test No. 89 (page 4-81). l Connect red probe of meter to rear accessory harness connector (CKT 21 ) and black probe to vehicle ground. Second Technician (Operator’s Station) l Set MASTER BATTERY switch ON. First Technician (Rear Grille Doors) l Check if meter indicates 18 to 30 volts dc. Does meter indicate 18 to 30 volts dc? i 9 BACKVIEW - LEFT TAILLIGHT Replace socket and wiring aeaembly in left taililght (page 10-207). \ TA107331 4-642