ARMY TM 9-6115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09248A-24/2
TABLE 2-6. UNIT TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
19. BATTERY CHARGE AMMETER SHOWS NO CHARGE WHEN BATTERIES ARE LOW OR DISCHARGED. - Cont.
Step 3. Test for battery voltage between negative and EXC terminal of alternator with MASTER SWITCH in the
PRIME/RUN position.
a. If battery voltage is present, do step 4.
b. If battery voltage is not present, do step 7.
Step 4. Test for defective battery charging alternator, paragraph 2-14.2.
a. If battery charging alternator is not defective, do Step 6.
b. If defective, replace battery charging alternator, paragraph 2-14.
Step 5. Test for defective battery charging ammeter shunt, paragraph 2-29.2
a. If shunt is not defective, do Step 4.
b. If defective, replace battery charging ammeter shunt, paragraph 2-29
Step 6. Test for defective BATTERY CHARGE AMMETER, paragraph 2-43.2.
a. If BATTERY CHARGE AMMETER is not defective, do Step 7.
b. if defective, replace BATTERY CHARGE AMMETER, paragraph 2-43.
Step 7. Check for breaks or loose connections in charging circuit, refer to Wiring Diagram FO-2
If breaks or loose connections are found, repair charging circuit
20. BATTERY CHARGE AMMETER SHOWS EXCESSIVE CHARGING AFTER PROLONGED OPERATION.
Step 1. Test for defective batteries, paragraph 2-12.1.
a. If batteries are not defective, do Step 2.
b. If defective, replace batteries, paragraph 2-12.
Step 2. Test for defective BATTERY CHARGE ammeter, paragraph 2-43.2
a. If BATTERY CHARGE ammeter is not defective, do Step 3.
b. If defective, replace BATTERY CHARGE ammeter, paragraph 2-43.
Step 3. Test for defective battery charging alternator, paragraph 2-14.2.
a. If battery charging alternator is not defective, do Step 4.
b. If defective, replace battery charging alternator, paragraph 2-14.
Step 4. Check for short in charging circuit, refer to Wiring Diagram FO-2.
If shorted, repair charging circuit.
21. AC VOLTMETER (VOLTS AC) DOES NOT INDICATE VOLTAGE.
Step 1. Test defective AC Voltmeter (VOLTS AC), paragraph 2-46.2.
a. If AC Voltmeter (VOLTS AC) is not defective, do Step 2.
b. If defective, replace AC Voltmeter (VOLTS AC), paragraph 2-46.
Step 2. Test for defective AM-VM transfer switch, paragraph 2-52.2.
a. If AM-VM transfer switch is not defective, do Step 3.
b. If defective, replace AM-VM transfer switch, paragraph 2-52.
2-22 Change 2
