Honda BF135A Manual page 41

BF135A•BF150A
• ALTERNATOR INDICATOR LINE INSPECTION
Turn the ignition switch ON.
Does the alternator indicator
lightcome ON?
NO
Check the No. 5 (15A) fuse.
Is the fuse normal?
YES
Check for open circuit in the L
line.
1 Stop the engine and discon-
nect the alternator 4P con-
nector.
2 Connect the No. 4 (White/
Blue) terminal of the alterna-
tor 4P connector to the body
to short using a jumper wire.
Alternator
harness side 4P
connector
Viewing from
terminal side
Does the alternator indicator
light come ON with the ignition
switch ON?
YES
Disassemble and service the
alternator (P. 6-9).
Start the engine.
YES
Does the alternator indicator
light go OFF?
No
Check for short circuit in the L
line.
1 Stop the engine and discon-
nect the alternator 4P con-
nector.
Does the alternator indicator
light come ON with the ignition
switch ON?
NO
Disassemble and service the
alternator.
NO • Check for short circuit in the
wire harness of the No. 5
(10A) fuse load line. Replace
or repair the main harness if
necessary.
• Replace the No. 5 (15A)
fuse.
Check for open circuit in the
NO
wire harness (White/Blue)
between the ECM and the
alternator.
Is the wire harness normal?
YES
Check the alternator indicator
light.
Is the alternator indicator light
normal?
YES
Substitute a known-good ECM
and recheck.
End of inspection (Good)
Yes
Replace or repair the wire har-
YES
ness (Short in the wire
between the ECM and the
alternator).
NO Replace or repair the wire har-
ness (Open in the wire
between the ECM and alter-
nator).
NO • Check the alternator indica-
tor light bulb. Replace the
bulb as necessary.
• If the bulb is normal, replace
the alternator indicator light.
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