TM 5-3805-262-203-13. BATTERY SYSTEM TROUBLESHOOTINGMALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION1. BATTERIES NEED WATER FREQUENTLY.Step 1. Apply parking brake and place transmission control lever in N (neu-t r a l ) p o s i t i o n .Tell assistant to start engine and operate at 1800 rpm.Record voltmeter indication and tell assistant to shut down engine.a. If voltmeter indicates more than 31 volts, replace alternator(page 5-10).b. If voltmeter indicates 24 to 31 volts, go to step 2 below.Step 2. Test battery open circuit voltage (page 5-142) and battery load ca-pacity (page 5-143).a. Replace a defective battery (page 5-148).b . I f b a t t e r i e s t e s t o k a y , c h e c k w i r i n g c o n n e c t i o n a t a l t e r n a t orBAT terminal, starter relay, and starter solenoid BAT terminalfor corrosion or loose connection. Clean and tighten connectionsas necessary.If wiring connections are okay, check for high resistance inbattery tables (refer to page 3-69, MALFUNCTION 3, step 5).2. BATTERIES DISCHARGED OR DO NOT MAINTAIN CHARGE.S t e p 1 . S e r v i c e b a t t e r i e s ( p a g e 5 - 1 4 0 ).B a t t e r y e l e c t r o l y t e i s t o x i c a n d c o r r o s i v e . U s e p r o t e c t i v e g o g g l e s a ndg l o v e s w h e n p e r f o r m i n g t h e f o l l o w i n g . A v o i d c o n t a c t w i t h s k i n , e y e s ,clothes, and don’t breathe vapors.a. Clean battery cases and add distilled water to battery cells asn e c e s s a r y.b. If batteries are okay, go to step 2 below.Step 2.Check cable connections at battery posts.a. Clean or tightenb . I f b a t t e r y c a b lebattery cable connections as necessary.connections are okay, go to step 3 below.3-99
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