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ISBe/ISB Series Engines – Alternator Overcharging

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Symptom Tree  

Battery cell is damaged (open circuit)

Check the condition of the batteries. Replace the batteries, if necessary. Refer to the OEM service manual.
 

Voltage regulator is malfunctioning

Check the voltage regulator. Replace the voltage regulator, if necessary. Refer to an Authorized Cummins Repair Facility.
 

Electronic fault codes are active

For instructions on how to read active fault codes, refer to Diagnostic Fault Codes in Section 1. If fault codes are active, contact a Cummins Authorized Repair Facility.
 
Contact a Cummins Authorized Repair Facility
Last Modified:  22-May-2002
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