Table 3. Charging System (60 Amp) Troubleshooting Procedure - continued

TM 9-2320-361-24-1

0012 00

BATTERY AND CHARGING SYSTEM TROUBLESHOOTING (Contd)

Table 3. Charging System (60 Amp) Troubleshooting Procedure (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

5. Measure voltage at terminal

1. If battery voltage is present

1. NO ALTERNATOR

end of lead 568.

(normal), the alternator is

OUTPUT

defective. Go to test 4 and check

positive output of alternator.

2. If voltage is not present, an open

lead or bad connection exists in

lead 568. Repair or replace lead

(WP 0090 00). Return to test 2.

Test 4. Test positive output of

alternator.

NOTE

Access cover was removed in test 3.

Input amps decrease in input

voltage normally causes an increase

in alternator output voltage.

1. Start engine

(TM 9-2320-361-10).

2. Set engine speed at 1200 RPM.

3. Turn headlights and

accessories to ON position.

4. Use multimeter to measure

1. If output voltage is between 24.0

alternator output voltage at

and 26.0 VDC, replace alternator

positive terminal (lead 2).

(WP 0085 00).

2. If output voltage is more than

28.5 VDC, go to test 5 and check

voltage drop on lead 2.

Test 5. Test voltage drop on lead 2.

1. If voltage drop on lead 2 is greater

Place multimeter positive lead

than 0.4 volts, repair or replace

on alternator positive output.

lead (WP 0090 00). Go to test 2.

Place multimeter negative

2. If voltage drop on lead 2 is less

lead on starter solenoid lug 2.

than 0.4 volts (normal), voltage

regulator output is too high.

Replace alternator (WP 0085 00).

Test 6. Test battery voltage into

power accessory switch

(WP 0012 00, table 3,

malfunction 1, test 4).

1. Disconnect lead 1 from pin D

of power accessory switch.

2. Turn power accessory switch

to ON position.

0012 00-22