TM 9-2320-363-20-1
Table 3-1. Troubleshooting (Cont)
Malfunction
Test or inspection
Corrective action
ELECTRICAL SYSTEM (CONT)
Charging Circuits (Cont)
1. LOW BATTERY VOLTAGE.
Refer to DDEC II troubleshooting (page 3-101).
Refer to DDEC III troubleshooting (page 3-345.0).
2. BATTERIES NOT CHARGING (EITHER VOLTAGE), VOLTMETER INDICATES VOLTAGE.
Step 1.
Check and clean battery terminals of corrosion and make sure connections
are tight.
Step 2.
Disconnect lead 6 from ground connection from batteries. Check for
continuity between lead 6 and ground.
If continuity is indicated, repair ground connection (page 3-2). If
no continuity is indicated, go to step 3.
Step 3.
Disconnect lead 6 from STE/ICE shunt. Check for continuity through the
STE/ICE shunt.
If continuity is indicated, repair lead 6 (page 3-2). If no
continuity is indicated, go to step 4.
Step 4.
Disconnect lead 6 from other end of STE/ICE shunt. Check for continuity at
lead 6.
If continuity is indicated, replace STE/ICE shunt (page 4-263).
If no continuity is indicated, repair lead 6 (page 3-2).
3. BATTERIES NOT CHARGING, VOLTMETER DOES NOT INDICATE VOLTAGE.
Step 1.
Disconnect lead 83 from negative (-) terminal on alternator. Check for
continuity between lead 83 and ground.
If continuity is indicated, go to step 2. If no continuity is
indicated, repair lead 83 (page 3-2).
Step 2.
Check for continuity between negative (-) terminal and negative field (F-)
terminal on alternator.
If continuity is indicated, go to step 3. If no continuity is
indicated, replace alternator (page 4-149).
Step 3.
Disconnect lead 16D from positive (+) terminal on alternator. Check for
+24 VDC at positive (+) terminal on alternator.
If +24 VDC is present, go to step 4. If no voltage is present,
replace alternator (page 4-149).
Change 3 3-23
