Yamaha YZF-R25 Service Manual page 363

7. Check the headlight relay.
Refer to "CHECKING THE RE-
LAYS" on page 8-85.
OK ↓
8. Check the entire lighting system
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-15.
OK ↓
Replace the ECU, meter assembly, or
tail/brake light. Refer to"REPLACING
THE ECU (engine control unit)" on
page 8-81.
NG →
Replace the headlight relay.
NG →
Properly connect or replace the wiring har-
ness.
8-18
LIGHTING SYSTEM