Sym Fiddle 50 Service Manual page 137

15. ELECTRICAL EQUIPMENT
Voltage Regulator Inspection
Check the each pins of coupler on the voltage
regulator.
Check voltage between battery terminal (red) and ground
(green).
Check continuity between ground and frame.
Check charging coil (white to ground) if its resistance is
within 0.2~1.0Ω
Check charging /illumination coil (yellow to ground) if its
resistance is within 0.2~0.8Ω
If wire circuit check is in normal and there is no
loose in the pins of voltage regulator coupler,
then measure the resistance among pins on the
couplers of voltage regulator.
Voltage Regulator
Multi-meter(+)
White
A
Multi-meter (-)
White A
Yellow B ∞
Red B 4~7
Green E ∞
If the resistance values are abnormal among the
pins, replace the voltage regulator.
Caution
If the probe is touched by finger, then the
resistance values will be incorrect.
It contains semi-conductor in circuit so the
measured resistance value will be in
different if different testers are used. Thus,
these values cannot be judged with
standards.
AC Generator Inspection
Remove body cover.
Disconnect the generator harness coupler.
Measure the resistance on both charging coil (the
white to ground) and illumination coil (the yellow
to ground).
Resistance Measurement: (20℃)
15-8
This chapter Contents
Inspection
Yellow Red Green
L B E
∞ 4~7
∞ 2.4~4.8
∞ ∞
2.4~4.8 ∞
Voltage regulator
Voltage regulator
coupler
Probable cause
Blown fuse or poor main switch
contact
Open-circuit wire
Open-circuit in alternator charging
coil or in illumination switch.
Charging coil (white - green): 0.2~1.0Ω
Illumination coil (yellow - green): 0.1~0.8Ω