Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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System Testing - Alternator



VISUAL INSPECTION:

- Excessive electrical loads on the vehicle.
- Constant running of the vehicle at low RPM.
- Loose or broken accessory drive belt.
- Loose generator mounting bolts.
- Fusible link between generator and starter is blown or corroded.
- Battery cable loose

PERFORM ARBST TEST FOR GENERATOR PERFORMANCE.

SYSTEM PERFORMANCE TEST
Before connecting any test equipment to the generator, make sure:
- The engine and ignition are off.
- The accessory drive belt is good and at the right tension.