From P. 2-44
Check the No.7 fuse (P. 18-18).
Is it blown?
NO
Check the regulator/rectifier ground
cable.
Is it normal?
YES
Check the battery voltage.
Is it 16.5 V or above?
NO
Check the battery voltage.
Is it 10.0 V or below?
YES
Is the excessive load connected?
NO
Check the alternator (P. 7-12).
Is it normal?
YES
Replace the regulator/rectifier
(P. 18-23).
2-45
YES
NO
YES
NO
YES
NO
82
Replace the blown fuse (P. 18-18).
Replace the main wire harness.
Check the regulator/rectifier
(P. 18-26).
Replace the ECM with a new one and
recheck.
Remove the load and recheck.
Replace the alternator (P. 7-3).