Sym PA12B Service Manual page 21

1. General Information
E. Starter Motor Malfunction
1.
Starter Motor doesn't rotate
Check and adjustment
Pull the brake handle or step
on the braking pedal
Braking light is activated
Check the battery circuit by
activating turning signal
Flashing normally
Push the staring button
and check if the starting
relay is activated
Starting relay activated
Connect the starting motor
to the battery
Starter Motor rotates
1-16
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Fault condition
Braking light not activated
Not flashing or dimmed
(60~120 flashes per minute)
Starting relay not activated
Starter Motor doesn't
rotate
Possible causes
1. Burnt Fuse
2. Insufficient Battery Voltage
3. Braking Switch abnormal
4. Main switch abnormal
1. Insufficient Battery capacity
1. Bad contact in the starter switch
2. Abnormal Starter relay
3. Loose coupler or terminals
1. Worn carbon brushes
2. Broken or shorted rotor windings
3. Broken Starter motor sub wire
4. Loose coupler
1. Loose coupler