System Test

1. Connect ammeter and voltmeter as follows:
a. Disconnect wire from terminal B of alternator, then connect ammeter negative probe to the wire.
b. Connect ammeter positive probe to B terminal of alternator.
c. Connect voltmeter positive probe to B terminal and the negative probe to ground.
2. Start engine and allow to run at 2000 RPM, then check reading of ammeter and voltmeter. Ammeter should read less than 10 amps. At 77°F, voltmeter should read to specifications under Specifications.
3. If voltage reading is greater than specified voltage, replace IC regulator. If voltage reading is less than specified, check IC regulator and alternator as follows:
a. With engine running and F terminal grounded, check voltage reading at B terminal.
b. If voltage is greater than specified, replace IC regulator. If voltage reading is less than specified, check alternator.
4. With engine running at 2000 RPM, turn on high beam headlights and place heater in HI position.
5. Check ammeter reading. If reading is less than 30 amps, repair alternator.