Section 06
ELECTRICAL
Sub-Section 06
(TESTING PROCEDURE)
06-06-13
VOLTAGE REGULATOR INSPECTION
A faulty voltage regulator is often responsible for
frequent burned bulbs.
CAUTION : Never run an engine with a
faulty or inoperative voltage regulator.
This could damage the DUCATI CDI module.
TESTING PROCEDURE
The regulator ground must be checked to ensure
the circuit is complete. If necessary, connect a
good ground wire from the regulator to the en-
gine.
A) Quick Test Without Voltmeter
CAUTION : Do not perform this test on
engines that have a DUCATI CDI system.
If a voltmeter is not available, a visual test can be
performed with satisfactory results.
Disconnect
all
lights and electric equipment.
While engine is running, disconnect and connect
regulator connector several times checking for a
spark.
A spark on regulator terminal indicates a good and
working regulator.
B) Voltmeter Test
NOTE :
Use a voltmeter able to read alter-
nating current (AC). For accurate reading,
use a RMS voltmeter.
Connect a wire of the voltmeter to a BLACK / YEL-
LOW wire.
Connect the other wire of the voltmeter to a YEL-
LOW wire.
Lift the rear of vehicle and support with a mechan-
ical stand.
Start the engine at an idle without opening the
throttle.
WARNING : Ensure the track is free of par-
ticles which might be thrown out while
track is rotating. Keep hands, tools, feet and
clothing clear of track. Ensure no-one is stand-
ing in close proximity to the vehicle.
Slowly open the throttle and accelerate the en-
gine to increase the RPM.
If the meter reads over 15 volts, the regulator is
defective and must be replaced.
CAUTION : Do not increase the RPM so
the voltage exceeds 15 V as the bulb(s)
will burn.
NOTE :
Whatever the voltmeter type used
(peak voltage or RMS) the voltage must not
exceed 15 V (a defective regulator will allow volt-
age to exceed 15 V as engine RPM is increased).
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