Yamaha YP250 Service Manual page 232

YP******
5. Dimmer switch/Pass switch
Refer to "CHECKING SWITCHES" section.
YP******
6. Wiring connection
S Check the connections of the entire lighting
system.
Refer to "WIRING DIAGRAM".
Check the condition of each of the lighting
system's circuits.
Refer to "LIGHTING SYSTEM CHECK"
YP805020
LIGHTING SYSTEM CHECK
1. If the headlight and the high beam indicator light fail to come on.
1. Bulb and bulb socket
Refer to "CHECKING SWITCHES" section.
2. Voltage
S Connect the pocket tester (DC20 V) to the
headlight and high beam indicator light cou-
plers.
A
When the dimmer switch is on low beam.
When dimmer switch is on high beam or
B the Pass switch is pushed.
Headlight:
Tester (+) lead ! Green
lead
Tester negative (–) lead ! Black
lead
High beam indicator light:
Tester (+) lead ! Yellow
Tester (–) lead ! Black
:
CONTINUITY
or Yellow
1
3
lead
4
lead
5
:
LIGHTING SYSTEM
NO CONTINUITY
Replace the left handlebar switch.
POOR CONNECTIONS
Correct.
NO CONTINUITY
Replace the bulb and/or bulb socket.
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