Symptom: Starting motor runs weakly Diagnosis procedures
Starting motor runs weakly.
Check if the lead wire connector from starter relay
to starter motor is poorly contacted.
Remove the starter motor lead wire and battery lead wire
from starter relay, press starter button; when starter relay
gives a click sound, measure with an ohmmeter resistance
between battery terminal on the relay and starter motor
terminal and check if it is on state.
Check if starter button
contact is poorly
contacted.
Disassemble starter motor and make the
following inspections
：
1. Check if the carbon brush is over worn;
2. Check if carbon brush spring is broken or
weak.
3. Check if armature commutator is over worn,
burnt, or injured, or contaminated.
Starter relay contact is
burnt or injured.
Yes
Yes
No
No
Turn on ignition switch; press horn button or slide
turn signal lamp switch.
Electric horn does not sound or sound
weakly.
Electric horn sounds loudly.
Turn signal lamp is bright.
Battery is low or the lead wire
connector connected with battery is
badly contacted.