KTM 400-660 LC4 1998-2005, Repair Manual

Page: 142 / 501

Checking the voltage regulator (Kokusan)
A defect voltage regulator can cause different kinds of trouble:
●
No voltage in the circuit
In this case, the voltage regulator must be disconnected at idle
speed. The voltage regulator is defect if the power consumers now
work properly.
If the power consumers are still not supplied with power, the switch,
the wiring harness or the ignition system must be checked for
defects.
●
Excessive voltage in the circuit
The bulbs burn out. In this case the voltage regulator must be
replaced.
Checking the capacitor
– Discharge the capacitor 1 by bridging the two terminals with a
screwdriver and remove.
– Connect the negative pole of a 12V battery with the negative
terminal of the capacitor. The connection between the positive pole
of the battery and the positive terminal of the capacitor ()
is made with a test lamp
3
.
– When the power circuit is closed, the test lamp must begin to light
up. As capacitor charging increases, the brightness of the test lamp
must decrease.
– The test lamp must go out after 0,5-2 seconds (depending on the
lamp capacity).
– If the test lamp does not go out or does not light up at all, the
capacitor is faulty.
!
CAUTION
!
D
ISCHARGE THE CAPACITOR BEFORE AND AFTER EACH TEST
.
W
HEN INSTALLING THE CAPACITOR
,
MAKE SURE THAT THE TERMINALS ARE
CONNECTED IN ACCORDANCE WITH THEIR MARKINGS
. C
ONNECT RED
/
WHITE CABLE
TO
+
TERMINAL
.
Check ignition coil
– Disconnect all cables and remove the spark plug connector.
– Use an ohmmeter to measure the following values.
NOTE: The indicated setpoint values correspond to a temperature of
20° C.
Replace the ignition coil if the measured values deviate significantly
from the setpoint values.
7-31E
ELECTRICAL – SC ‘99
RESISTANCE
0,425 – 0,575
Ω
10,80 – 16,20 k
Ω
MEASUREMENT
primary coil
secondary coil
COLOURS
blue/white – ground
blue/white – ignition wire
3