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ELECTRICAL SYSTEM
Alternator Inspection
There are three types of alternator failures: short, open
(wire burned out), or loss in rotor magnetism. A short or open
in one of the coil wires will result in either a low output, or no
output at all. A loss in rotor magnetism, which may be caused
by dropping or hitting the alternator, by leaving it near an
electromagnetic field, or just by again, will result in low
output.
● To check the alternator output voltage, do the following
procedures.
○ Disconnect the alternator connector
○ Connect the hand tester. (+) to red/white; (-) to white
○ Start the engine.
○ Run it at the rpm.
○ Note the voltage readings (total 3 measurements).
Alternator Output Voltage:
Minimum of 7.5 Amps at 2000RPM
CDI Output Test: (Using Peak Reading Adaptor)
Connect all CDI wires to stator wires. Disconnect CDI
module wire from ignition coil primary terminal. Connect one
lead to engine ground and the other to the ignition coil
primary wire leading from the CDI module. Set meter to read
DC Volts. Crank engine and check output of CDI wire to coil.
Reconnect CDI wire to coil.
Average Output w/Digital Voltmeter with or without Peak
Reader:
200 – 400 DCV
【7-10】
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