TM 9-6115-730-24
0011
TROUBLESHOOTING FAILURES WITHOUT FAULT CODES - Continued
SYMPTOM
32.
Alternator Does Not Charge Batteries.
MALFUNCTION
Alternator Drive Belt Loose or Defective.
CORRECTIVE ACTION
STEP 1.
On EMCP set Engine Control switch to OFF/RESET. Set Battery Disconnect
Switch to OFF. Set DEAD CRANK SWITCH to OFF.
STEP 2.
Inspect the condition of the alternator drive belt. If the alternator drive belt is worn
or damaged, replace drive belt (WP 0075).
STEP 3.
Verify the problem has been resolved.
MALFUNCTION
Charging Circuit Defective.
CORRECTIVE ACTION
STEP 1.
On EMCP set Engine Control switch to OFF/RESET. Set Battery Disconnect
Switch to OFF. Set DEAD CRANK SWITCH to OFF.
STEP 2.
Inspect cables between battery, Battery Disconnect Switch, and starter solenoid
(FO-1, sheet 2).
a.
Check shunt (R4) for loose/corroded connections. Clean and tighten as
required.
b.
Clean and tighten battery cable ends, as required.
c.
Replace cable(s), as required (WP 0047).
d.
If voltage is correct, perform load test on batteries individually
e.
If battery fails, replace battery (WP 0050).
f.
If batteries pass load test, charge batteries fully (WP 0050).
g.
If voltage is not correct, inspect Battery Disconnect Switch and battery
charging circuit (FO-1, sheet 2) or replace alternator (WP 0074).
STEP 3.
Set Battery Disconnect Switch to on. Set DEAD CRANK switch to NORMAL.
Turn the ENGINE CONTROL switch to COOL DOWN/STOP.
STEP 4.
Observe and record battery voltage on GSC display.
a.
Set Engine Control Switch to MANUAL START.
b.
Observe battery voltage on GSC display. Battery voltage should be
2 Vdc higher than recorded voltage.
c.
If voltage falls below minimum, replace alternator (WP 0074).
STEP 5.
Verify the problem has been resolved.
0011-43
