Generic Race 50, Service Manual

Page: 41 / 209

40
Y
N
Y
N
Y N
N Y
Trouble diagnosis program for the malfunction that turn signal lamp does not come on
Turn signal lamp
does not come on
Part of turn signal lamps at
one side does not come on
None of turn signal lamps at
one side comes on
None of turn signal
lamps comes on
Remove turn signal lamp
shade to check turn signal
lamp bulb for burn-out
Repl
ace
turn
signa
l
lamp
bulb
Use a voltmeter
to measure
voltage between
power cord
contact on lamp
holder and
negative
Voltage display
available
No voltage
display
Lamp holder
ground poor
or poor
contact
between turn
signal lamp
bulb and
lamp holder
Power
cord of
lamp
holder
opened
Remove turn signal lamp
shade to check turn
signal lamp bulb for
burn-out
Replace
turn signal
lamp bulb
Disconnect connector
of turn signal lamp
switch and then use
an ohm meter to
detect if turn signal
lamp switch is
conductive at
malfunctioning side
Output
power cord
at
malfunctioni
ng side
opened or
lamp holder
ground poor
Internal contact
of turn signal
lamp switch
contacts poorly
Depress horn button to check operation
of electric horn
Electric horn
can make loud
and clear sound
Electric horn does
not make any
sound or is hoarse
Power supply
from battery is
normal
Battery level runs
low
Remove turn signal lamp
shade to check turn
signal lamp bulb for
burn-out
Toggle turn signal lamp switch and
short two terminal lugs on flasher
with a conductor or screwdriver
Replace turn signal
lamp bulb,
meanwhile, check
rectification
regulator for
improper operation.
After shorted, turn signal lamp
does not come on yet.
After shorted, turn signal
lamp comes on.
Disconnect connector of turn signal lamp switch and then
short power input conductor of turn signal lamp switch and
power supply conductors of left and right turn signal lamps
respectively with a conductor
Flasher has
been damaged
After shorted, turn
signal lamp comes on.
After shorted, turn signal
lamp does not come on yet.
Internal contact of turn
signal lamp switch poor
Use test lamp method to check power input conductor of turn
signal lamp switch for power output
Test lamp
comes on
Test lamp does
not come on
Power supply conductor of turn
signal lamp opened or shorted
Circuit between ignition switch and
flasher or flasher and turn signal
lamp switch shorted or opened