Generic Onyx 50 - Page 32

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Diagnosis on starter motor running weak
Starter motor running
weak
Turn the ignition switch; press the horn; press or turn the
steering lamp switch.
The electric horn does not make
sound or makes weak sound; the
steering lamp emits weak light.
The electric horn makes loud sound
and the steering lamp emits bright
light.
Battery power shortage or bad
contact of conductor joint
Check whether the contact of
conductor joint between starting relay
and starter motor is bad.
Disassemble the lead wires connecting to starter motor
and battery from the starting relay and press the starting
b
utton. Check whether the resistance between the
b
attery terminal and the starter motor terminal is normal
with ohm meter when the starting relay makes
connection sound.
Inspection &
elimination
Disassemble the starter motor and check:
1. whether the carbon brush is excessively
abraded;
2. whether the carbon brush spring is
ruptured or lacks elasticity;
3. whether the surface of armature
commutator is stained, burnt or
damaged.
4. whether the armature commutator is
excessively abraded;
Contacts of starting
relay are burnt or
damaged.