TM 9-2350-247-20-1SERVICE AND/OR BLACKOUT STOPLIGHTS MALFUNCTION 0038 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. M548A1S procedure is shown.T1. Operate all exterior lights (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. Check to see if service stop and BO stoplights both malfunction.2. Do service stop and BO stoplights both malfunction?YESNOGO TO BY (PAGE 0038 00-3)2Y1. Check stoplight switch adjustment (WP 0274 00).2. Is brake switch in proper adjustment?YESNO2YN1. Adjust stoplight switch(WP 0274 00).2. Verify no faults found.0038 00-1
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