Yamaha RS90K Manuel D'atelier page 704

TROUBLESHOOTING
GRIP WARMER AND THUMB WARMER DO NOT OPERATE.
Check the main fuse, ignition fuse, and signal fuse.
Refer to "FUSE INSPECTION" in CHAPTER 2.
FAULTY
OK
Check the battery.
Refer to "BATTERY INSPECTION" in CHAPTER 2.
OUT OF SPECIFICATION
OK
Check the stator coil.
Refer to "CHARGING SYSTEM".
OUT OF SPECIFICATION
OK
Check the main switch.
Refer to "IGNITION SYSTEM".
NO CONTINUITY
OK
Check the grip and thumb warmer.
NO CONTINUITY
OK
Check the grip and thumb warmer adjustment
switch.
NO CONTINUITY
CORRECT
Check the load control relay.
Refer to "IGNITION SYSTEM".
FAULTY
OK
Check the grip warmer system's wiring.
Refer to "CIRCUIT DIAGRAM".
FAULTY
OK
Correct the connection and/or replace the rectifier/
regulator and/or ignitor unit.
GRIP WARMER SYSTEM
Replace the main fuse, ignition fuse, and/or signal
fuse.
Replace and/or charge the battery.
Refer to "BATTERY INSPECTION" in CHAPTER
2.
Replace the stator coil assembly.
Replace the main switch.
Replace the grip and/or thumb warmer.
Replace the left handlebar switch and/or right
handlebar switch.
Replace the load control relay.
Properly connect or repair the grip warmer sys-
tem's wiring.
8-37
– +
ELEC