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15
5
ALTERNATOR OVERVIEW
This test measures the output of the alternator under load conditions.
This information provides the basis for further charging system tests. It
also detects the presence of an open or shorted diode that causes an
output loss of several amps and can cause the failure of other diodes.
Symptomatic Check before Proceeding:
Battery should be in good condition and charged before testing the
Alternator.
Check warning light indications.
Check belt condition and tension.
Check all cables and connections.
Check the battery for corrosion and dirty terminals.
Does the battery have a low state of charge? (See section 2 and 3)
Make sure all electrical items are off.
Check for Alternator noise indicating worn out bearings or loose or
glazed belt.
AUTO METER
BVA-350
SYSTEM ANALYZER
READY TO CONNECT
VDrop
ALTERNATOR
SETUP
