Performance Test
1. INSPECT CHARGING CIRCUIT WITHOUT LOADHINT: If a battery/generator tester is available, connect the tester to the charging circuit as per manufacturer's instructions.
Charging circuit test connections:
(a) If a tester is not available, connect a voltmeter and ammeter to the charging circuit as follows:
^ Disconnect the wire from terminal B of the generator, and connect it to the negative (-) probe of the ammeter.
^ Connect the positive (+) probe of the ammeter to terminal B of the generator.
^ Connect the positive (+) probe of the voltmeter to terminal B of the generator.
^ Ground the negative (-) probe of the voltmeter.
(b) Check the charging circuit as follows:
With the engine running from idling to 2,000 rpm, check the reading on the ammeter and voltmeter.
Standard amperage:
10 A or less
Standard voltage:
13.2 - 14.8 V
If the voltmeter reading is more than standard voltage, replace the voltage regulator.
If the voltmeter reading is less than standard voltage, check the voltage regulator and generator as follows:
^ With terminal F grounded, start the engine and check the voltmeter reading of terminal B.
^ If the voltmeter reading is more than standard voltage, replace the voltage regulator.
2. INSPECT CHARGING CIRCUIT WITH LOAD
(a) With the engine running at 2,000 rpm, turn on the high beam headlights and place the heater blower switch at "HI".
(b) Check the reading on the ammeter.
Standard amperage:
30 A or more
If the ammeter reading is less than the standard amperage, repair the generator.
HINT: If the battery is fully charged, the indication will sometimes be less than standard amperage.