2003 YAMAHA GRIZZLY 660 light

8-71 1. Spark plug cap
1. Capuchon de bougie
1. Tapa de bujía
1. Spark plug wrench
1. Clé à bougie
1. Llave de bujía
EBU00864
Spark plug inspection
Removal
1. Remove panel A. (See page 8-17 for panel
removal and installation procedures.)
2. Remove the spark plug cap.
3. Use the spark plug wrench in the tool kit to re-
move the spark plug as shown.
Inspection
The spark plug is an important engine component
and is easy to inspect. The condition of the spark
plug can indicate the condition of the engine.
The ideal color on the white insulator around the
center electrode is a medium-to-light tan color for a
ATV that is being ridden normally.
U5KM61.book Page 71 Friday, July 26, 2002 11:13 AM

8-107 1. Rear brake light switch
2. Adjusting nut
1. Contacteur de feu stop
2.Écrou de réglage
1. Interruptor de la luz del freno trasero
2. Tuerca de ajuste
EBU00834
Adjusting the rear brake light switch
The rear brake light switch, which is activated by
the brake pedal and brake levers, is properly ad-
justed when the brake light comes on just before
braking takes effect. If necessary, adjust the brake
light switch as follows.
Turn the adjusting nut while holding the rear brake
light switch in place. To make the brake light come
on earlier, turn the adjusting nut in direction
a. To
make the brake light come on later, turn the adjust-
ing nut in direction
b.
U5KM61.book Page 107 Friday, July 26, 2002 11:13 AM

8-125 1. Main fuse 2. Spare fuse
3. Headlight fuse 4. Ignition fuse
5. Auxiliary DC jack fuse 6. Four-wheel drive fuse
7. Signaling system fuse 8. Odometer fuse (Backup)
9. Spare fuse (× 3)
1. Fusible principal 2. Fusible de rechange
3. Fusible de phare 4. Fusible d’allumage
5. Fusible de prise pour accessoires
6. Fusible du système 4x4
7. Fusible du système de signalisation
8. Fusible du compteur kilométrique
9. Fusible de rechange (× 3)
1. Fusible principal 2. Fusible de repuesto
3. Fusible del faro
4. Fusible del sistema de encendido
5. Fusible de la toma de CC auxiliar
6. Fusible del sistema de tracción en las cuatro ruedas
7. Fusible del sistema de señalización
8. Fusible del cuentakilómetros (reserva)
9. Fusible de repuesto (× 3)
EBU00745*
Fuse replacement
1. The main fuse case and the fuse box are lo-
cated the seat.
2. If a fuse is blown, turn off the main switch and
install a new fuse of the specified amperage.
Then, turn on the switches. If the fuse imme-
diately blows again, consult a Yamaha deal-
er.
Specified fuses:
Main fuse: 30 A
Headlight fuse: 15 A
Ignition fuse: 10 A
Auxiliary DC jack fuse: 10 A
Four-wheel-drive fuse: 3 A
Signaling system fuse: 10 A
Odometer fuse (Backup): 10 A
U5KM61.book Page 125 Friday, July 26, 2002 11:13 AM

8-129 1. Cover
1. Cache
1. Cubierta
1. Bulb holder cover
1. Cache du support d’ampoule
1. Cubierta del portabombillas
EBU01231
Replacing a headlight bulb
If a headlight bulb burns out, replace it as follows.
1. Remove the bulb holder cover at the rear of
the headlight by pulling it off.
2. Remove the headlight bulb holder by turning
it counterclockwise.
U5KM61.book Page 129 Friday, July 26, 2002 11:13 AM

8-131 1. Bulb holder
1. Fixation d’ampoule
1. Portabombillas
3. Remove the defective bulb by pushing it in
and turning it counterclockwise.
WARNING
_ A headlight bulb is hot when it is on and imme-
diately after it is turned off. Wait for the bulb to
cool before touching or removing it. You can
be burned or a fire could start if the bulb touch-
es something flammable. _4. Insert a new headlight bulb into the bulb hold-
er, push it in, and then turn the bulb clockwise
until it stops.
5. Install the bulb holder by turning it clockwise.
6. Install the bulb holder cover at the rear of the
headlight.
U5KM61.book Page 131 Friday, July 26, 2002 11:13 AM

8-133 1. Headlight beam adjusting screw
1. Vis de réglage du faisceau de phare
1. Tornillo de ajuste de la luz del faro
EBU01089
Headlight beam adjustmentCAUTION:_ It is advisable to have a Yamaha dealer make
this adjustment. _To raise the beam, turn the adjusting screw in di-
rection
a.
To lower the beam, turn the adjusting screw in di-
rection
b.
U5KM61.book Page 133 Friday, July 26, 2002 11:13 AM

8-135
EBU01105
Tail/brake light bulb replacement
If the tail/brake light bulb burns out, have a
Yamaha dealer replace it.
U5KM61.book Page 135 Friday, July 26, 2002 11:13 AM

8-137
EBU00413
Troubleshooting
Although Yamaha machines receive a rigid in-
spection before shipment from the factory, trouble
may occur during operation.
Any problem in the fuel, compression, or ignition
systems can cause poor starting and loss of pow-
er. The troubleshooting chart describes a quick,
easy procedure for making checks. If your ma-
chine requires any repair, take it to a Yamaha
dealer.
The skilled technicians at a Yamaha dealership
have the tools, experience, and know-how to prop-
erly service your machine. Use only genuine
Yamaha parts on your machine. Imitation parts
may look like Yamaha parts, but they are often in-
ferior.
Consequently, they have a shorter service life and
can lead to expensive repair bills.
WARNING
Do not smoke when checking the fuel system.
Fuel can ignite or explode, causing severe in-
jury or property damage. Make sure there are
no open flames or sparks in the area, including
pilot lights from water heaters or furnaces.
U5KM61.book Page 137 Friday, July 26, 2002 11:13 AM