Symptom Tree t013
Cause | Correction |
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Alternator belt is loose |
Check the alternator belt tension. Refer to Procedure 013-005 in Section 13. |
Alternator pulley is loose on the shaft |
Tighten the pulley. Refer to the OEM service manual. |
Alternator drive pulley is loose on the water pump shaft |
Make sure the drive pulley is tight on the shaft. Refer to Procedure 009-004 in Section 9. |
Battery cables or connections are loose, broken, or corroded (excessive resistance) |
Check the battery cables and connections. Refer to the OEM service manual. |
Batteries have failed |
Check the condition of the batteries. Replace the batteries, if necessary. Refer to the OEM service manual. |
Vehicle gauge is malfunctioning |
Check the vehicle gauge. Refer to the OEM service manual. |
Alternator or voltage regulator is malfunctioning |
Test the alternator output. Replace the alternator or voltage regulator, if necessary. Refer to Procedure 013-001 in Section 13. |
Electrical system is “open” (blown fuses, broken wires, or loose connections) |
Check the fuses, wires, and connections. Refer to the OEM service manual and wiring diagrams. |
Alternator is overloaded, or alternator capacity is below specification |
Install an alternator with a higher capacity. Refer to Procedure 013-001 in Section 13 and the OEM service manual. |
Battery temperature is above specification |
Position the batteries away from heat sources. Refer to the OEM service manual. |