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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Test D: The Generator Is Noisy

PINPOINT TEST D: THE GENERATOR IS NOISY

Normal Operation
The generator is belt-driven by the engine accessory drive system. Generator noise can originate from faulty bearings or electrical problems in the diodes or stator.

This pinpoint test is intended to diagnose the following:
- Accessory drive belt
- Loose bolts/brackets
- Generator/pulley


D1-D3: