Troubleshooting - Yamaha YQ50 Service Manual

TROUBLESHOOTING

FLASHER LIGHTS, TAIL/BRAKE LIGHT, "OIL" WARNING LIGHT DOES NOT WORK
HORN DOES NOT SOUND, FUEL METER DOES NOT WORK
NOTE :
Remove the following parts before proceeding with the troubleshooting:
• Side covers and footrest board
• Handlebar cover
For accurate troubleshooting use the following special tools :
Pocket tester :
90890-03112
1. Fuse
• Remove the fuse.
• Connect the pocket tester (Ω x 1) to the fuse.
• Check the fuse for continuity.
Refer to "FUSE INSPECTION" in Chapter 3.
2. Battery
• Check the condition of the battery.
Refer to "BATTERY INSPECTION" in
CHAPTER 3.
Battery voltage :
12.8 V or more at 20
3. Main switch
• Disconnect the main switch from the wire
harness.
• Turn the main switch to "✱".
• Check for continuity between :
Red Q and Gray E
• Turn the main switch to "ON".
• Check for continuity between :
Red Q and Brown W
CONTINUITY
° °
C (68 F)
MEETS
SPECIFICATION
MEETS
SPECIFICATION
8-22
SIGNAL SYSTEM
NO CONTINUITY
Fuse defect © Replace.
DOES NOT MEET SPECIFICATION
• Clean battery terminals.
• Charge or replace the battery.
LOCK LOCK
OFF OFF
CHECK CHECK
ON ON
DOES NOT MEET SPECIFICATION
Main switch defect © Replace.
ELEC
BW BW B R Br Br Gy Gy
BW BW
R B
Gy Gy
Br Br