Yamaha DT125RE 2005 Service Manual page 280

2. Bulb socket
• Disconnect the bulb socket and leads from
the wire harness.
• Install the bulb to the bulb socket.
• Connect the pocket tester (Ω 1) to the
bulbs socket lead end and coupler.
A
Positive tester probe
Negative tester probe
B
Positive tester probe
Lead
Negative tester probe
A
B
• Check the bulb socket for continuity.
• Is the bulb socket OK?
YES
Replace the bulb
socket.
Blue Terminal
Black Terminal
Blue/Red
Black Lead
NO
8-23
LIGHTING SYSTEM
3. Main switch
• Disconnect the main switch coupler from
the wire harness.
• Connect the pocket tester (Ω 1) to the main
switch.
• Check the main switch for continuity.
A
Positive tester probe
Negative tester probe
Lead
Switch
position
ON
OFF
B
Positive tester probe
Negative tester probe
Lead
Switch
position
ON
OFF
C
Positive tester probe
Negative tester probe
Lead
Switch
position
P
OFF
k:Continuity
ELEC
Red Lead
Brown-blue
Good Bad
condition condition
k
X X
k
X X
Yellow-blue Lead
Blue-Black
Good Bad
condition condition
k
X X
k
X X
Red Lead
Blue-Black
Good Bad
condition condition
k
X X
k
X X
X: No continuity
k
k
k
k
k
k