Yamaha YFM250XL(C) Service Manual page 304

3.If the brake light fails to come on:
(for New Hampshire and Maine)
1.Bulb and bulb socket
Check the bulb and bulb socket for conti-
nuity.
2.Brake switch
Refer to "SWITCH INSPECTION".
3.Lights switch
Refer to "SWITCH INSPECTION".
4.Voltage
Connect the pocket tester (DC 20 V) to
the bulb socket leads.
Tester (+) lead → Blue terminal 1
Tester (–) lead → Yellow terminal 2
Turn the main switch to "ON".
Check the voltage (12 V).
This circuit is not faulty.
8
CONTINUITY
CONTINUITY
CONTINUITY
MEETS
SPECIFICATION
8 - 34
SIGNAL SYSTEM
NO CONTINUITY
Replace the bulb and/or bulb socket.
NO CONDITION
Replace the brake switches.
NO CONDITION
Replace the lights switch.
L
Y
B
OUT OF SPECIFICATION
The wiring circuit from the main switch to
the bulb socket connector is faulty, repair
it.
– +
ELEC
1
L
2
Y
B