Yamaha XT660X 2004 - Troubleshooting

8 - 33
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ELEC
LIGHTING SYSTEM
EAS00784
YES
NO
EAS00786
YES
NO
YES
NO
EAS00787
YES
NO
4. Dimmer switch
• Check the dimmer switch for continuity.
Refer to “CHECKING THE SWITCHES”.
• Is the dimmer switch OK?
The dimmer switch is
faulty. Replace the
left handlebar switch.
5. Pass switch
• Check the pass switch for continuity.
Refer to “CHECKING THE SWITCHES”.
• Is the pass switch OK?
The pass switch is
faulty. Replace the
left handlebar switch.
6. Headlight relay
• Disconnect the headlight relay from the wire
harness.
• Connect the pocket tester (
Ω ×
1) and bat-
tery (12 V) to the headlight relay terminal as
shown.
• Check the headlight relay for continuity.
Battery positive terminal
→
red/yellow
1
Battery negative terminal
→
yellow/black
2
Positive tester probe
→
red/blue
3
Negative tester probe
→
blue/white
4
• Does the headlight relay have continuity
between red/blue and blue/white?
Replace the head-
light relay.
7. Wiring
• Check the entire lighting system’s wiring.
Refer to “CIRCUIT DIAGRAM”.
• Is the lighting system’s wiring properly
connected and without defects?
Check the condition
of each of the lighting
system’s circuits.
Refer to “CHECK-
ING THE LIGHTING
SYSTEM”.
Properly connect or
repair the lighting
system’s wiring.
+
R/L
L/W
R/YY/B
1
2
3
4