Brake Light Doesn't Illuminate; Engine Starts Hard - ZONGSHEN ZS250GY-3 Service Manual

Ignition switch is
damaged.
has voltage
Ignition coil has open circuit
or short circuit.
70
2.10 Analysis of brake light
Dismantle the cover of brake light and check
whether its bulb is burned-out.
Yes
Replace the bulb of
brake light.
After short circuit,brake light still
doesn't illuminate.
Rub the power lead of brake light switch
with cathode wire with a screwdriver or a
lead.Check the spark.
Yes
When rubbing,there is
spark.
The lead between brake
light switch and brake light
has short circuit or open
circuit.
2.11 Analysis of ignition system
Dismantle high-voltage wire and
check whether there is spark spurt.
Fire
Spark plug is
dagmaged.
R e p a i r o r
replace it.
Reconnect it.Turn off the ignition switch and
observe the high voltage coil.
Cut off the power export end of
ignition and measure the voltage.
Replace it.
Brake light doesn
illuminate.
With a lead,make short circuit between
two connection end of brake light
switch or two lead end.
When rubbing ,there
is no spark.
T h e p o w e r l e a d b e t w e e n
ignition switch and brake light
switch has shor t circuit or
open circuit.

Engine starts hard.

Cut off the connecion of charging coil
of generator and triggering coil and
respectively measure the voltage.
no voltage
Electronic ignitor is
damaged.
Replace it.
No
After short circuit,brake light
can illuminate.
The switch of brake light is
adjusted unproperly or the
inner connecting point has bad
connection.
No
No fire
Measure the DC resistance of
two coils.
T h e f l y w h e e l
Charging and triggering
rotor of generator
coil have short circuit or
loses magnetism
open circuit.
seriously.
R e p a i r o r
replace it.
Add magnetism
or replace it.