Honda LEAD 110 2009 Service Manual page 418

SWITCH LINE INSPECTION
Turn the ignition switch OFF.
Remove the main relay (page 21-15).
Short the relay (Black) connector terminals of the
wire harness side with a jumper wire.
Connection: Red – Red/Yellow
Turn the ignition switch ON.
Measure the voltage between the fuse box connec-
tor of the wire harness side and ground.
Connection: Red/Yellow (+) – Ground (–)
If the battery voltage appears, the main relay switch
line is normal.
If the battery voltage does not appear, inspect the
following:
– Open circuit in Red wire between the battery and
main relay
– Open circuit in Red/Yellow wire between the
main relay and fuse box
COIL LINE INSPECTION
COIL POWER LINE
Turn the ignition switch OFF.
Remove the main relay (page 21-15).
Turn the ignition switch ON.
Measure the voltage between the main relay con-
nector of the wire harness side and ground.
Connection: Black (+) – Ground (–)
If the battery voltage appears, the main relay coil
power line is normal.
If the battery voltage does not appear, inspect the
open circuit in Black wire between the fuse box and
main relay.
COIL GROUND LINE
Turn the ignition switch OFF.
Remove the main relay (page 21-15).
Check for continuity between the main relay con-
nector of the wire harness side and ground.
Connection: Green – Ground
If there is continuity, the main relay coil ground line
is normal.
If there is no continuity, inspect the open circuit in
Green wire between the main relay and ground.
LIGHTS/METERS/SWITCHES
MAIN RELAY
(BLACK)
CONNECTOR
MAIN
FUSE 20 A
(+)
(–)
(–)
MAIN
R/Bl
Bl
FUSE 20 A
IGNITION
FUSE
SWITCH 10 A
JUMPER
WIRE
(+)
(–)
FUSE BOX
MAIN RELAY
(+)
CONNECTOR
MAIN RELAY
CONNECTOR
21-17