Yamaha MT-01 T 2005 Service Manual page 430

• Incorrect connection
• Improperly grounded circuit
• Poor contacts (main or light switch)
• Burnt-out headlight bulb
Headlight bulb burnt out
• Wrong headlight bulb
• Faulty battery
• Faulty rectifier/regulator
• Improperly grounded circuit
• Faulty main switch
• Faulty light switch
• Headlight bulb life expired
Tail/brake light does not come on
• Wrong tail/brake light LED
• Too many electrical accessories
• Incorrect connection
• Burnt-out tail/brake light LED
Tail/brake light LED burnt out
• Wrong tail/brake light LED
• Faulty battery
• Incorrectly adjusted rear brake light switch
• Tail/brake light LED life expired
Turn signal does not come on
• Faulty turn signal switch
• Faulty turn signal/hazard relay
• Burnt-out turn signal bulb
• Incorrect connection
• Damaged or faulty wire harness
• Improperly grounded circuit
• Faulty battery
• Blown, damaged or incorrect fuse
Turn signal flashes slowly
• Faulty turn signal/hazard relay
• Faulty main switch
• Faulty turn signal switch
• Incorrect turn signal bulb
Turn signal remains lit
• Faulty turn signal/hazard relay
• Burnt-out turn signal bulb
Turn signal flashes quickly
• Incorrect turn signal bulb
• Faulty turn signal/hazard relay
• Burnt-out turn signal bulb
Horn does not sound
• Improperly adjusted horn
• Damaged or faulty horn
TROUBLESHOOTING
• Faulty main switch
• Faulty horn switch
• Faulty battery
• Blown, damaged or incorrect fuse
• Faulty wire harness
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