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Diagnosis on steering lamp failure in illumination
.
Steering lamp failure in
illumination
Steering lamps at one side
are partly not light.
Steering lamps at one side
are wholly not light.
All the steering lamps
are not light.
Remove the lamp covers and
check whether the bulbs are
burnt.
Replace
bulbs
Measure the voltage
between the contact of
the power cord of lamp
holder and the negative
pole with a voltage
meter.
Voltage
available
No voltage
Bad earth of lamp
holder or bad
connection
between steering
lamp bulb and
lamp holder.
Open
circuit of
power cord
of lamp
holder
Remove the lamp covers and
check whether the bulbs are
burnt.
Replace bulbs
Remove the connector
of steering lamp switch
and check whether the
switch works normally
at the breakdown side
with an ohm meter.
Open circuit of
output power
cord or bad
earth of lamp
holder at the
breakdown side.
Bad contact inside
the steering lamp
switch.
Press the horn button and check whether
the horn works normally.
The horn makes
loud sound
The horn can not
make or makes
coarse sound.
Normal battery
power supply
Battery power supply
shortage
Remove the steering lamp
cover and check whether the
bulb is burnt.
Turn the steering lamp switch and use
a lead wire or a screwdriver to short-
circuit two lugs of flasher.
Replace steering lamp
bulb and check whether
the rectifier regulator
works normally.
The steering lamp is not
light.
The steering lamp is
light.
Remove the connector of steering lamp switch and use a lead
wire to short-circuit the input power cord of the switch and the
power cords connecting the left/right steering lamp.
The flasher is
broken.
The steering lamp is light.
The steering lamp is not
light.
Bad contact inside the steering
lamp switch.
Check whether there is power supply via the input power cord of
steering lamp switch with a test lamp.
