TM 5-2420-230-24-1
Table 3-6. Unit Troubleshooting Table. -- Continued
Malfunction
Test or Inspection
Corrective Action
38.
CHARGING INDICATOR LIGHT REMAINS ILLUMINATED OR DOES NOT CHARGE.
Step 1.
Check drive belt (1) and alternator pulley (2) for excessive wear or damage (TM 5-2420-230-10).
If drive belt (1) is loose, inspect self tensioner (3) and replace if necessary (Para L-9).
If drive belt (1) is worn or damaged, replace drive belt (Para 4-6).
If alternator pulley (2) is worn or damaged, replace alternator pulley (Para 12-10).
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive
electrical circuits, a direct short may result. Damage to equipment and injury or death to personnel
may occur.
Step 2.
Check alternator exciter relay (4) (signal wire) to ensure it is functioning correctly (refer to FO-1).
If exciter relay (4) is not functioning correctly, replace relay (Para 12-15).
Step 3.
With engine running, check for 26 to 28 Vdc at terminal B on alternator (5) (refer to FO-3).
If alternator (5) is not charging 26-28 Vdc, replace alternator (Para 12-10).
Step 4.
Check wiring harness (6) for continuity.
If continuity is not present, replace wiring harness (6) (Para 12-27).
Change 1
