ARMY TM 9-6115-645-24
AIR FORCE TO 35C2-3-444-12
MARINE CORPS TM 09244A/09245A-24/2
TABLE 2-6. UNIT TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE FAILS TO CRANK.
Step 1. Test for defective DEAD CRANK switch, paragraph 2-110.1.
a. If DEAD CRANK switch is not defective, do Step 2.
b. f defective, replace DEAD CRANK Switch, paragraph 2-110.
Step 2. Check for loose or corroded battery cable terminals or battery posts.
a. If terminals are tight and posts are clean, do Step 3.
b. If not clean and tight, clean and tighten battery cable terminals and posts, paragraph 2–12.4.
Step 3. Check that batteries are installed correctly, paragraph 2-12.5.
a. If batteries are installed correctly, do Step 4.
b. If not properly installed, install batteries correctly, paragraph 2-12.5.
Step 4. Test for low or no battery charge, paragraph 2-12.1.
a. If fully charged, do Step 5.
b. If not fully charged, replace batteries, paragraph 2-12.
Step 5. Test for defective DC CONTROL POWER circuit breaker, paragraph 2-50.2.
a. If DC CONTROL POWER circuit breaker is not defective, do Step 6.
b. If defective, replace DC CONTROL POWER circuit breaker, paragraph 2-50.
Step 6. Test for battery voltage at input of MASTER SWITCH.
a. If battery voltage is present, do Step 7.
b. If battery voltage is not present do Step 8.
Step 7. Test MASTER SWITCH output voltage in Start position.
a. If battery voltage is present at MASTER SWITCH output terminal (7) and ground, do Step 11.
b. If battery voltage is not present at output terminal, test MASTER SWITCH, paragraph 2-32.3.
Step 8. Test for defective battery charging ammeter shunt, paragraph 2-54.2.
a. If not defective do Step 9.
b. If defective, replace battery charging ammeter shunt, paragraph 2-54.
Step 9. Test for defective reverse battery diode (CR1), paragraph 2-66.2.
a. If not defective, do Step 10.
b. If defective, replace reverse battery diode, paragraph 2-66.4.
2-13
