TM 9-2350-247-20-1SERVICE TAILLIGHT DOES NOT OPERATE 0041 00INITIAL SETUP:Maintenance LevelUnitTools and Special ToolsGeneral Mechanic’s Tool Kit (WP 0541 00, Item 57)Multimeter (WP 0541 00, Item 29)Personnel RequiredUnit MechanicReferencesSee your -10Equipment ConditionEngine stopped (see your -10)Carrier blocked (see your -10)NOTEM548A1 and M548A3 troubleshooting procedures are the same. M548A1 procedure i s shown.T1. Operate exterior lights in all positions (see your -10).2. Do any exterior lights operate in any light switch positions?YESNOTN1. Go to no exterior lights operate(WP 0034 00).Y1. Turn main light switch on light switch to SER DRIVE.2. Remove main harness circuit 21 plug (1) from left taillightjack (2).3. Measure voltage between main harness circuit 21 plug (1) andground.4. Does multimeter read less than 17 volts?YESNOYN1. Replace service taillight bulb(WP 0278 00).2. Verify no faults found.0041 00-1
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