Checking The Lighting System - Yamaha XVS250 2001 Service Manual

EAS00784
5. Dimmer switch
D Check the dimmer switch for continuity.
Refer to "CHECKING THE SWITCHES".
D Is the dimmer switch OK?
YES
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6. Pass switch
D Check the pass switch for continuity.
Refer to "CHECKING THE SWITCHES".
D Is the pass switch OK?
YES
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7. Wiring
D Check the entire lighting system's wiring.
Refer to "CIRCUIT DIAGRAM".
D Is the lighting system's wiring properly con-
nected and without defects?
YES
Check the condition
of each of the lighting
system's circuits.
Refer to "CHECKING
THE LIGHTING SYS-
TEM".
NO
The dimmer switch is
faulty. Replace the
left handlebar switch.
NO
The pass switch is
faulty. Replace the
left handlebar switch.
NO
Properly connect or
repair the lighting sys-
tem's wiring.
7-28
LIGHTING SYSTEM
EAS00788

CHECKING THE LIGHTING SYSTEM

1. The headlight and the high beam indicator
light fail to came on.
1. Headlight bulb and socket
D Check the headlight bulb and socket for con-
tinuity.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS".
D Are the headlight bulb and socket OK?
YES
2. Voltage
D Connect the pocket tester (DC 20 V) to the
headlight and high beam indicator light cou-
plers as shown.
When the dimmer switch is set to "
A
When the dimmer switch is set to "
B
Headlight
Tester positive probe 
Tester negative probe  black
High beam indicator light
Tester positive probe  yellow
Tester negative probe  black
Headlight coupler (wire harness side)
ELEC
NO
Replace the head-
light bulb, socket or
both.
"
"
yellow or green
1 2
3
4
5
G
Y