Yamaha DT125RE 2005 Service Manual page 279

TROUBLESHOOTING
Tail light/Auxiliary light do not come on
Check:
1. Tail/Brake light bulb/Auxiliary light bulb
2. Tail light bulb socket/Auxiliary light
3. Main switch
4. Wiring connection
(of the entire lighting system)
NOTE:
• Before troubleshooting, remove the follo-
wing part(s):
1. Sidecovers (left and right)
2. Seat
3. Fuel tank
4. Headlight cover
5. Headlight unit
• Troubleshoot with the following special
tool(s).
Pocket tester
90890-03112
Inductive Tachometer:
90890-03113
LIGHTING SYSTEM
1. Bulb
• Remove the bulb.
• Connect the pocket tester (Ω 1) to the bulb
terminals.
Positive tester probe
Negative tester probe
Positive tester probe
Negative tester probe
A. Tail/Brake bulb
B. Auxiliary light bulb
• Check the bulb for continuity.
• Is the bulb OK?
YES
8-22
ELEC
terminal
terminal
terminal
terminal
NO
Replace the bulb.