Yamaha TZR50 '03 Service Manual page 224

4. Cable connections
• Check the wiring connections of the whole lighting
system.
See the "ELECTRICAL DIAGRAM" section
3. The tail light does not come on
1. Brake light tail light bulb
• Remove the bulb of the brake light tail light
• Connect the pocket tester (Ω x 1) to the bulb of the
brake light tail light
(+) probe of tester
(-) probe of tester
(+) probe of tester
(-) probe of tester
• Check if the continuity is correct in the bulb of the
brake light tail light
2. Voltage
• Disconnect the connector of the tail light
• Start the engine
• Connect the pocket tester (20 VDC) to the tail light
connector
(+) probe of tester
(-) probe of tester
Terminal
Terminal
Terminal
Terminal
CONTINUITY OK
Blue terminal
Black terminal
8-25
LIGHTING SYSTEM
NO CONTINUITY
Replace the bulb of the brake
light tail light.
ELEC