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Diagnosis on weak light from lamps
Weak light from lamps
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
the resistance between the output cable terminals of lighting
coil of electromagnetic motor is lower than the standard value
with an ohm meter.
Turn the ignition switch; press the horn or turn the
steering lamp switch.
Short circuit of
lighting coil.
Start the engine and limit the
rotation speed; remove the
connector between the rectifier
regulator and the cable assembly;
check the brightness of lamps.
The lamp works
normally.
Still weak light from the lamp.
Low stable voltage of
rectifier regulator.
Check whether there is short circuit in
the charging coil of electromagnetic
coil and the charging system.
The horn makes
loud sound and the
steering lamp
emits bright light.
The horn makes coarse sound; the
steering lamp emits weak light.
Power shortage of battery or bad
connection between battery and the
ignition switch.
Inspection &
elimination
Dismantle the headlamp assembly
and check whether the bulb glass is
black or yellowish green.
Check whether the bulb power
for the illumination system is in
accordance with requirements.
Replace headlamp
bulb.
1. Check whether contacts inside the
illumination switch and dimmer
switch are in good condition.
2. Check whether the contact of
connector and earth wire is in good
condition.
Replace lamp
bulb.
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