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CHECKING THE TAILLIGHT
(LEDs)
1. Disconnect the taillight coupler.
2. Connect two jumper leads "1"
from the battery terminals to the
respective coupler terminal as
shown.
Battery (+) terminal → Blue lead
"2"
Battery (-) terminal → Black lead
"3"
3. Check:
• LED (for proper operation)
Does not light → Replace the tail-
light assembly.
• A wire that is used as a jumper
lead must have at least the same
capacity of the battery lead, oth-
erwise the jumper lead may burn.
• This check is likely to produce
sparks, therefore, make sure no
flammable gas or fluid is in the
vicinity.
CHECKING THE AC MAGNETO
1. Inspect:
• Lighting coil resistance
Out of specification → Replace.
Tester (+) lead → Yellow lead "1"
Tester (-) lead → Ground "2"
Light-
ing coil
Tester selector
resis-
position
tance
0.224–
0.336 Ω
Ω × 1
at 20 °C
(68 °F)
CHECKING THE RECTIFIER/
REGULATOR
1. Connect the battery leads.
2. Start the engine.
3. Turn on the headlight and taillight
by turning on the light switch.
4. Inspect:
• Out-put voltage
Out of specification → Replace
rectifier/regulator.
Tester (+) lead → Yellow lead "1"
Tester (-) lead → Black lead "2"
Tester se-
Out-put
lector posi-
voltage
12.5–13.5 V
at 5,000 r/
min
7-20
LIGHTING SYSTEM
tion
ACV-20
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