TM 9-2350-247-20-1MASTER SWITCH ON INDICATOR DOES NOT LIGHT 0049 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 is shown.T1. Remove MASTER SWITCH ON indicator cover lens (1), gasket(2), and bulb (3).2. Check continuity between bulb center contact (4) and bulbbase (5).3. Does multimeter indicate any continuity?YESNOTN1. Replace MASTER SWITCH ONbulb (WP 0271 00).2. Verify no faults found.Y1. Install MASTER SWITCH ON indicator bulb, gasket, and lens.2. Turn MASTER SWITCH ON.3. Is BATTERY-GENERATOR+4p gauge in the green zone?YESNOGO TO BY (PAGE 0049 00-3)0049 00-1
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