Yamaha YZFR1Y(C) 2009 Service Manual page 411

3. Check the entire signaling system's
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-21.
OK↓
This circuit is OK.
The tail/brake light fails to come on.
1. Check the front brake light switch.
Refer to "CHECKING THE
SWITCHES" on page 8-105.
OK↓
2. Check the rear brake light switch.
Refer to "CHECKING THE
SWITCHES" on page 8-105.
OK↓
3. Check the entire signaling system's
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-21.
OK↓
This circuit is OK.
The turn signal light, turn signal indicator light or both fail to blink.
1. Check the front turn signal/position
light bulbs, rear turn signal light
bulbs and sockets.
Refer to "CHECKING THE BULBS
AND BULB SOCKETS" on page 8-
108.
OK↓
2. Check the turn signal switch.
Refer to "CHECKING THE
SWITCHES" on page 8-105.
OK↓
3. Check the turn signal relay.
Refer to "CHECKING THE TURN
SIGNAL RELAY" on page 8-114.
OK↓
SIGNALING SYSTEM
NG→
Properly connect or repair the signal-
ing system's wiring.
NG→
Replace the front brake light switch.
NG→
Replace the rear brake light switch.
NG→
Properly connect or repair the signal-
ing system's wiring.
NG→
Replace the front turn signal/position
light bulb(s), rear turn signal light
bulb(s), socket(s) or both.
NG→
Replace the left handlebar switch.
NG→
Replace the turn signal relay.
8-24