Checking The Lighting System - Yamaha YJ50RAP Service Manual

EAS00787
5. Wiring
• Check the entire lighting system's wiring.
Refer to "CIRCUIT DIAGRAM".
• Is the lighting system's wiring properly
connected and without defects?
YES
Check the condi-
tion of each of the
lighting system's cir-
cuits.
Refer to "CHECK-
ING THE LIGHT-
ING SYSTEM".
EAS00788

CHECKING THE LIGHTING SYSTEM

1. The headlight and the high beam indicator
light fail to come on.
1. Headlight bulb and socket
• Check the headlight bulb and socket for
continuity.
• Are the headlight bulb and socket OK?
YES
NO
Properly connect or
repair the lighting
system's wiring.
NO
Replace the head-
light bulb, socket or
both.
LIGHTING SYSTEM
2. Voltage
• Connect the pocket tester (DC 20 V) to the
headlight and high beam indicator light
couplers as shown.
È When the dimmer switch is set to "
É When the dimmer switch is set to "
Headlight coupler (wire harness side)
Positive tester probe → yellow 1
Negative tester probe → black 3
Headlight
Positive tester probe →
Negative tester probe → black 3
High beam indicator light
Positive tester probe → yellow 4
Negative tester probe → black 5
Meter light assembly coupler (wire harness side)
• Set the main switch to "ON".
• Start the engine.
• Set the dimmer switch to "
• Measure the voltage (12 V) of green 2 on
the headlight coupler (wire harness side).
• Is the voltage within specification?
This circuit is OK.
7 - 26
ELEC
yellow 1 or green 2
5
Br B B Br
Y Br/W Br/W Y
Gy
Gy
" or "
YES
– +
".
".
4
".
NO