LINE ASSEM. (no. 4) 6N5134 - Caterpillar

Note: This symptom is not an electronic system fault.Probable Causes
Alternator drive belt and tensioner
Alternator
Charging circuitRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 1
Troubleshooting Test Steps Values Results
1. Alternator Drive Belt and Tensioner
A. Inspect the condition of the alternator drive belt.
B. Check the belt tension. Refer to the Operation and Maintenance Manual, "Belts - Inspect/Adjust/Replace".
Note: Excessive belt tension can result in damage to the alternator.
Drive belt
Result: The alternator drive belt is not in good condition or the belt tension is incorrect.
Repair: If the alternator drive belt is worn or damaged, replace the belt. Refer to Disassembly and Assembly for the correct procedure.
If necessary, replace the automatic belt tensioner. Refer to Disassembly and Assembly for the correct procedure.
Result: The alternator drive belt is in good condition and the belt tension is correct.
Proceed to Test Step 2.
2. Alternator
A. Verify that the alternator is operating correctly.
Alternator
Result: The alternator is not operating correctly.
Repair: Repair the alternator or replace the alternator, as necessary. Refer to Disassembly and Assembly, "Alternator - Remove" and Disassembly and Assembly, "Alternator - Install" for the correct procedure.
Result: The alternator is operating correctly.
Proceed to Test Step 3.
3. Charging Circuit
A. Inspect the battery cables, wiring, and connections in the charging circuit.
Charging circuit
Result: The charging circuit is not operating correctly.
Repair: Clean all connections and tighten all connections. Replace any faulty parts.
Result: The charging circuit is operating correctly.
Contact the Dealer Solutions Network (DSN).