Yamaha YZ450FX 2019, Owner'S Service Manual

Page: 353 / 388

ELECTRICAL COMPONENTS
8-58
EAM30357
CHECKING THE BULBS AND BULB
SOCKETS
1. Remove:
• Bulb
NOTICE
ECA25930
Be sure to hold the socket firmly when re-
moving the bulb. Never pull the lead, other-
wise it may be pulled out of the terminal in
the coupler.
TIP
Bulbs “a” is used for warning light and can be re-
moved from their respective socket by carefully
pulling them out.
2. Check:
• Bulb (for continuity)
(with the digital circuit tester)
No continuity

Replace.
TIP
Before checking for continuity, set the digital cir-
cuit tester to “

” range.
3. Check:
• Bulb socket (for continuity)
(with the digital circuit tester)
No continuity

Replace.
TIP
Check each bulb socket for continuity in the
same manner as described in the bulb section;
however, note the following.
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a. Install a good bulb into the bulb socket.
b. Connect the digital circuit tester probes to the
respective leads of the bulb socket.
c. Check the bulb socket for continuity. If any of
the readings indicate no continuity, replace
the bulb socket.
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EAM30290
CHECKING THE FUSES
The following procedure applies to all of the fus-
es.
1. Remove:
• Seat
Refer to “GENERAL CHASSIS” on page 4-1.
2. Check:
•
Main fuse “1”
• Radiator fan motor fuse “2”
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a. Connect the digital circuit tester to the fuse
and check the continuity.
TIP
Set the digital circuit tester selector to “

”.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with tachom-
eter
YU-A1927
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with tachom-
eter
YU-A1927
a
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with tachom-
eter
YU-A1927
1 1 1
2 2 2