Checking The Signal System - Yamaha YFM450FAR Service Manual

CHECKING THE SIGNAL SYSTEM

1.If the brake light fails to come on:
1.Bulb and bulb socket
Check the bulb and bulb socket for
G
continuity.
2.Brake light switches
Refer to "CHECKING THE SWITCH".
3.Voltage
Connect the pocket tester (DC 20 V) to the
G
bulb socket connector.
Tester (+) lead → Yellow terminal 1
Tester (–) lead → Black terminal 2
Turn the main switch to "ON".
G
Pull in the brake lever or push down on the
G
brake pedal.
Check the voltage (12 V) of the "Yellow"
G
lead on the bulb socket connector.
This circuit is not faulty.
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SIGNAL SYSTEM
NO CONTINUITY
Replace the bulb and/or bulb socket.
NO CONTINUITY
Replace the brake light switch.
OUT OF SPECIFICATION
The wiring circuit from the main switch to the
bulb socket connector is faulty, repair it.
– +
ELEC