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Troubleshooting
Troubleshooting on alternator
Alternator makes noises.
Do carbon brushes whistle?
yes
Rework slip rings/replace carbon brushes.
Battery produces excessive gas (vapour)
no
Check contact between regulator/alternator
and between alternator/diode carrier.
Is contact poor?
yes
Repair cable connections.
no
Check regulator.
Is regulator defective?
yes
Renew regulator.
no
Check battery.
Is battery defective?
yes
Renew battery.