Honda TRX680FA Service Manual page 536

ELECTRIC STARTER
DIODE
INSPECTION
Remove the fuel tank (page 6-39).
DIODE
Remove the diode from the wire harness.
Z
Remove the seat (page 3-4).
Remove the diode from the fuse box.
DIODE
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Check for continuity between the diode terminals.
I
When there is continuity, a small resistance value
will register.
If there is continuity in one direction, the diode is
normal.
22-14