TM 10-3930-675-20-1
0025 00-11
ENGINE BATTERY VOLTAGE CIRCUITS TROUBLESHOOTING - CONTINUED
0025 00
Table 3. Error Code 1442 - Unswitched Battery Supply Circuit Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 1442 - Unswitched Battery Supply
Circuit Failure
1. Turn ignition switch to OFF
position and measure battery
voltage from positive (+)
terminal to negative (-)
terminal. Voltage should be at
least 12V. Check each battery
in system.
If voltage is not as required,
charge or replace battery (WP
0107 00).
2. Turn ignition switch to OFF
position and measure battery
voltage from positive (+)
terminal to negative (-)
terminal. Voltage should be
+12V. Check voltage while
trying to start engine. Voltage
should be at least +6V during
cranking. Check each battery
in system.
If voltage is not as required,
charge or replace battery (WP
0107 00).
3. Start engine and check battery
voltage. Voltage should be
higher than voltage check
with engine off (static).
Replace alternator if damaged or
not operating properly (WP
0069 00).
+12V = STATIC
+6V = START
