Table 4-2. Unit Troubleshooting
TEST OR INSPECTION
1. FAILURE OF BATTERY CHARGING CIRCUIT
Remove rings, bracelets, wristwatches, and neck chains before working around the locomotive.
Jewelry can catch on equipment and cause injury, or may short across an electrical circuit and
cause severe burns or electrical shock.
Be careful not to short out battery terminals. Do not smoke or use open flame near batteries.
Batteries may explode from a spark. Battery acid is harmful to skin and eyes.
Step 1. Check for insufficiently charged batteries.
Charge battery if not fully charged. Replace battery if unable to charge. (para 4-30).
Step 2. Check for dirty or loose battery terminals.
Clean and tighten terminals.
Step 3. Check for loose battery charging alternator belts.
Adjust belts (para 4-34).
Step 4. Check for obvious damage to battery charging alternator.
If defective, refer to TM 5-2815-233-14.
Step 5. Check for brushes worn beyond limits.
If worn refer to TM 5-2815-233-14.
Step 6. Check for defective voltage regulator by checking continuity of voltage regulator.
Refer to TM 5-2815-233-14.