Checking The Lighting System - Yamaha 2004 YXR660 Service Manual

EB805020

CHECKING THE LIGHTING SYSTEM

1. If the headlights fail to come on:
1. Bulb and bulb socket
• Check the bulb and bulb socket for conti-
nuity.
2. Voltage
• Connect the pocket tester (DC 20 V) to the
headlight couplers.
É
È
Tester (+) lead →
Green terminal 1 or Yellow terminal 2
Tester (–) lead → Black terminal 3
È When the light switch is on "
É When the light switch is on "
• Turn the main switch to "ON".
• Turn the light switch to "
• Check the voltage (12 V) of the "Green"
and "Yellow" leads on the bulb socket con-
nector.
This circuit is not faulty.
LIGHTING SYSTEM
CONTINUITY
".
L
".
H
" or " ".
L
H
MEETS
SPECIFICATION
9 - 29
NO CONTINUITY
Replace the bulb and/or bulb socket.
OUT OF SPECIFICATION
The wiring circuit from the main switch to the
bulb socket connector is faulty, repair it.
– +
ELEC