Yamaha 2004 YXR660 Service Manual page 500

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4. Light switch
Refer to "CHECKING THE SWITCH" in chap-
ter 9. (Manual No.: 5UG-F8197-10)
5. Headlight relay
• Remove the headlight relay from the wire
harness.
• Connect the pocket tester (Ω × 1) and the
battery (12 V) to the headlight relay termi-
nals.
Tester (+) lead → Blue terminal 1
Tester (–) lead → Green terminal 2
Battery (+) terminal → Yellow terminal 3
Battery (–) terminal → Black terminal 4
Tester (+) lead → Blue terminal 1
Tester (–) lead → Yellow terminal 5
• Check the headlight relay for continuity.
EB805013
6. Wiring connection
• Check the connections of the entire light-
ing system.
Refer to "CIRCUIT DIAGRAM".
Check the condition of each of the lighting
system's circuits.
Refer to "CHECKING THE LIGHTING SYS-
TEM" in chapter 9.
(Manual No.: 5UG-F8197-10)
LIGHTING SYSTEM
CORRECT
CONTINUITY
CORRECT
– 45 –
INCORRECT
Replace the light switch.
NO CONTINUITY
Replace the headlight relay.
POOR CONNECTION
Properly connect the lighting system.
– +
ELEC