Checking The Lighting System - Yamaha XC50V Service Manual

EAS00788

CHECKING THE LIGHTING SYSTEM

1. The headlight and the high beam indicator
light fail to come on.
1. Headlight bulb and socket
8 Check the headlight bulb and socket for
continuity.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS"
8 Are the headlight bulb and socket OK?
YES
Replace the headlight bulb,
socket or both.
2. High beam indicator light bulb and socket
8 Check the high beam indicator light bulb
and socket for continuity.
Refer to "CHECKING THE BULBS AND
BULB SOCKETS"
8 Are the high beam indicator light bulb and
socket OK?
YES
Replace the high beam in-
dicator light bulb , socket
or both.
LIGHTING SYSTEM
NO
NO
8-29
3. Voltage
8 Connect the pocket tester (DC 20 V) to
the headlight and high beam indicator
light couplers as shown.
When the dimmer switch is set to "%"
When the dimmer switch is set to "&"
Headlight coupler (wire harness side)
Headlight
Positive tester probe
Negative tester probe
Positive tester probe
Negative tester probe
1
2
G
Y
B
High beam indicator light
Positive tester probe
Negative tester probe
Br
G/W
G/W
G B B G
2
8 Set the main switch to "ON".
8 Start the engine.
8 Set the dimmer switch to "%" or "&".
8 Measure the voltage (DC 12 V) on the
headlight coupler (wire harness side).
8 Measure the voltage (DC 12 V) on the
dimmer switch coupler (wire harness
side) when the dimmer switch is set to
"&".
8 Is the voltage within specification?
-
ELEC
green 1 1 1 1 1
black 2 2 2 2 2
yellow 3 3 3 3 3
black 4 4 4 4 4
3
G
Y
B
yellow 1 1 1 1 1
black 2 2 2 2 2
1
Y
Br
+
4