Yamaha YFM400FWA 2000 5GH3-AE1 Service Manual page 369

EB803020
TROUBLESHOOTING
IF THE FOUR-WHEEL DRIVE INDICATOR LIGHT FAILS TO COME ON:
Procedure
Check:
1.Fuse (main, four-wheel drive)
2.Battery
3.Main switch
4.On command four-wheel drive switch
NOTE:
Remove the following part(s) before trou-
bleshooting:
1)Seat
2)Front carrier
3)Front fender
Use the following special tool(s) for trou-
bleshooting.
EB802011
1.Fuse (main, four-wheel drive)
Refer to "SWITCH INSPECTION".
EB802012
2.Battery
Check the battery condition.
Refer to "BATTERY INSPECTION" in
CHAPTER 3.
Open-circuit voltage:
12.8 V or more at 20 ˚C (68 ˚F)
3.Main switch
Refer to "SWITCH INSPECTION".
2WD/4WD SELECTING SYSTEM
CONTINUITY
CORRECT
CORRECT
*
5.Gear motor
6.Wiring connections
(the entire 2WD/4WD selecting system)
Pocket tester:
P/N. YU-03112, 90890-03112
NO CONTINUITY
Replace the fuse.
INCORRECT
Clean the battery terminals.
Recharge or replace the battery.
INCORRECT
Replace the main switch.
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