Operation and maintenance manual

Troubleshooting Symptoms Charts QSB4.5 and QSB6.7
Page TS-10 Section TS - Troubleshooting Symptoms
Alternator Overcharging
Cause Correction
STEP 1
Batteries have failed
.............
Check the condition of the batteries. Replace the
batteries, if necessary. Refer to the OEM service
manual.
OK
Go To Next Step
STEP 2
Voltage regulator is malfunctioning
.............
Check the voltage regulator. Replace the voltage
regulator, if necessary. Refer to an Authorized
Cummins Repair Facility.
OK
Go To Next Step
STEP 3
Contact a Cummins® Authorized Repair Facility