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9 For YP400A
3. Turn the key to “ON” and turn on
the electrical circuit in question to
check if the device operates.
4. If the fuse immediately blows
again, have a Yamaha dealer
check the electrical system.
EAU34240
Replacing a headlight bulb
This model is equipped with quartz bulb
headlights. If a headlight bulb burns
out, have a Yamaha dealer replace it
and, if necessary, adjust the headlight
beam.
1. Ignition fuse
2. Signaling system fuse
3. Headlight fuse
4. Radiator fan fuse
5. Backup fuse (for clock and rear storage
compartment light)
6. Fuel injection system fuse
7. Spare fuse
7
123456
Specified fuses:
Main fuse:
40.0 A
Ignition fuse:
10.0 A
Signaling system fuse:
10.0 A
Headlight fuse:
20.0 A
Hazard fuse:
10.0 A
Radiator fan fuse:
10.0 A
Fuel injection system fuse:
10.0 A
ABS control unit fuse:
YP400A 10.0 A
ABS motor fuse:
YP400A 30.0 A
ABS solenoid fuse:
YP400A 20.0 A
Backup fuse:
10.0 A
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EAU24181
Tail/brake light
This model is equipped with an
LED-type tail/brake light.
If the tail/brake light does not come on,
have a Yamaha dealer check it.
EAU39880
Front turn signal light
If a front turn signal light does not come
on, have a Yamaha dealer check its
electrical circuit or replace the bulb.
EAU34263
Replacing a rear turn signal
light bulb
1. Place the scooter on the center-
stand.
2. Remove cowling C for replacing
the left turn signal light bulb or
cowling D for replacing the right
turn signal light bulb. (See
page 6-7.)
3. Remove the socket (together with
the turn signal light bulb) by turning
it counterclockwise.
4. Remove the burnt-out bulb by
pushing it in and turning it counter-
clockwise.
5. Insert a new bulb into the socket,
1. Turn signal light bulb socket
1
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push it in, and then turn it clock-
wise until it stops.
6. Install the socket (together with the
bulb) by turning it clockwise.
7. Install the cowling removed.
EAU47900
Replacing the license plate
light bulb
1. Place the scooter on the center-
stand.
2. Remove cowling B. (See
page 6-7.)
3. Remove the license plate light cov-
er and license plate light lens by
removing the screws.
4. Remove the burnt-out bulb by pull-
ing it out.5. Insert a new bulb into the socket.
6. Install the license plate light lens
and license plate light cover by in-
stalling the screws.
7. Install the cowling.
1. Turn signal light bulb
2. Turn signal light bulb socket
2
1
1. License plate light lens
2. License plate light cover
3. Screw
2
3
1
1. License plate light bulb
1
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9Engine overheating
WARNING
EWAT1040
Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be
blown out under pressure, which could cause serious injury. Be sure to wait until the engine has cooled.
Place a thick rag, like a towel, over the radiator cap, and then slowly rotate the cap counterclockwise to the de-
tent to allow any residual pressure to escape. When the hissing sound has stopped, press down on the cap
while turning it counterclockwise, and then remove the cap.
TIP
If coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended coolant
as soon as possible.
Wait until the
engine has cooled.
Check the coolant level in the
reservoir and radiator.
The coolant level
is OK.The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer checkand repair the cooling system.Add coolant. (See TIP.)
Start the engine. If the engine overheats again,
have a
Yamaha dealer check
and repair the cooling system.
There is
leakage.
There is
no leakage.