TM-5-4310-389-14
Table 3-2. Unit Troubleshooting Procedures (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE (Contd)
29.
Battery undercharged (ammeter indicates constant discharge) (Contd).
Step 2. Check for loose or broken V-belt. Tighten or replace V-belt.
Step 3. Check for worn or broken brushes. Replace brush assembly. Contact Direct Support
Maintenance.
Step 4. Check for defective charging system. Perform alternator test procedures to determine
extent of problem.
30. Battery overcharges.
Step 1. Check for defective wire harness. Perform harness test.
Step 2. Check for defective charging system. Replace voltage regulator. Contact Direct Support
Maintenance.
Step 3. Check for poor or inadequate ground. Ensure clean ground contact.
Step 4. Check for broken ammeter lead wire. Clean, repair, or replace as necessary.
31.
Battery charges at idle but discharges under load conditions.
Step 1. Check for loose or slipping V-belts. Adjust belt tension or replace belts as necessary.
Step 2. Check for defective alternator. Perform diode test. If defective, contact Direct Support
Maintenance.
32.
Ammeter shows (-) under moderate load; battery appears charged.
Step 1. Test for defective diodes. Replace diodes. Contact Direct Support Maintenance.
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