Yamaha YZF-R1S Service Manual page 423

5. Headlight relay (on/off)
S Disconnect the headlight relay (on/off) from
the coupler.
S Connect the pocket tester (Ω
tery (12 V) to the headlight relay (on/off) as
shown.
Positive battery lead ! red/yellow
Negative battery lead ! yellow/black
Positive tester probe ! red/yellow
Negative tester probe ! black/green
S Does the Headlight relay (dimmer) have
continuity between red/yellow
black/green ?
4
YES
6. Headlight relay (dimmer)
S Disconnect the headlight relay (dimmer)
from the coupler.
S Connect the pocket tester (Ω
tery (12 V) to the headlight relay (dimmer) as
shown.
Positive battery lead ! black
Negative battery lead ! yellow
Positive tester probe ! black/green
Negative tester probe ! black/yellow
1) and bat-
1
2
3
4
and
3
NO
Replace the dimmer
relay.
1) and bat-
1
2
3
4
8-30
LIGHTING SYSTEM
S Does the headlight relay (dimmer) have
continuity between black/green
black/yellow ?
4
YES
EAS00787
7. Wiring
S Check the entire lighting system's wiring.
Refer to "CIRCUIT DIAGRAM".
S Is the lighting system's wiring properly con-
nected and without defects?
YES
Check the condition
of each of the lighting
system's circuits.
Refer to "CHECK-
ING THE LIGHTING
SYSTEM".
ELEC
and
3
NO
Replace the head-
light relay (dimmer).
NO
Properly connect or
repair the lighting
system's wiring.