33
Y
N
Y
N
Diagnosis on motorcycle lamp failure in illumination
Motorcycle lamp
failure in illumination
AC power supply system
for illumination
DC power supply
system for illumination
Remove the connector between the conductor
bundle of electromagnetic motor and the cable
assembly; check whether there is power
supply via the output conductors of the
lighting coil with a test lamp.
Press the horn button or
turn the steering lamp
switch.
The test lamp
is not light.
The test lamp
is light.
Open circuit or short
circuit of lighting
coil or output wires
Start the engine and remove the
connector between the rectifier
regulator and the cable assembly.
The lamp is light
The lamp is not
light
Short circuit inside the
rectifier regulator.
Dismantle the headlamp
assembly and check whether
any bulb is burnt.
The horn can make loud
sound and the steering
lamp is light.
The horn can not make
loud sound and the
steering lamp is not light.
Normal
battery power
supply
Rapidly strike a lead wire on
the negative/positive poles
of battery and check spark.
No spark
Spark
Power shortage
of battery
1.
Check whether the
fuse is burnt out.
2.
Check whether open
circuit or short
circuit occurs
between the battery
and ignition switch.
3.
Check whether open
circuit or short
circuit occurs to the
ignition switch.
Replace the headlamp bulb and check
all the other lamp bulbs.
Check whether there is power output
via input wires of illumination switch
with a test lamp.
Use a lead wire to short circuit the
power wire and the output wire of
the illumination switch.
Open circuit or short circuit between
the electromagnetic motor/ ignition
switch and the illumination switch.
