DSG-423 CHARGING SYSTEM
06-8
Generator Output Test
WARNING: REFER TO CAUTIONS & WARNINGS AT
THE BEGINNING OF THIS SECTION.
CAUTION: To prevent damage to the generator, do
not make jumper wire connections except as direct-
ed.
CAUTION: Do not allow any metal object to come in
contact with the housing and the internal diode
cooling fins with the ignition on or off. A short cir-
cuit may result and burn out the diodes.
In order to check the generator, the use of rotunda
Starting and charging System Tester 078-00005 (VAT-
40) or equivalent, is recommended.
NOTE: Refer to the test equipment user’s manual for
complete directions on examining the charging system.
NOTE: Turn off all lamps and accessories.
1. Switch the tester to ammeter function.
2. Connect the positive and negative leads of the tester
to the battery.
3. Connect current probe to generator B+ terminal to
measure generator output.
4. With the engine running at 2000 rpm, adjust the
VAT-40 or equivalent load bank to determine the
output of the generator. Generator output should be
greater than values given in the graph below.
Generator Voltage Test
WARNING: REFER TO CAUTIONS & WARNINGS AT
THE BEGINNING OF THIS SECTION.
1. Switch the tester to the voltmeter function.
2. Connect the positive lead to the generator A-
terminal connector and the negative lead to ground.
3. Turn off all electrical accessories.
4. With the engine running at 2000 rpm, check the
generator voltage.
5. Voltage should be between 13.0-15.5 volts.
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