In-Vehicle Testing

1. Use a suitable battery/alternator tester connected to charging circuit following manufacturer's instructions. If tester is not available a suitable voltmeter and ammeter may be used as follows:

Fig. 4 Alternator Test Connections:

a. Disconnect battery ground cable.
b. Connect ammeter in series between alternator wire terminal B and alternator, Fig. 4.
c. Connect positive terminal of voltmeter to terminal B.
d. Connect negative terminal of voltmeter to engine ground.
e. Connect battery ground cable.
2. Start engine and run to normal operating temperature. Raise engine speed to 2000 RPM, amperage should not exceed 10 amps. Voltage should be 13.5-15.1 on 1.0L/3-60.6 engine and 13.5-14.3 volts on 1.3L/4-79 & 1.6L/4-97 engines.
3. If voltage is above specifications, replace IC regulator.

Fig. 5 Grounding Terminal F:

4. If voltage is less than proper specification. With engine off, ground terminal F as shown in Fig. 5 and start engine.
5. If voltage is above specifications, replace IC regulator.
6. If voltage is less than specifications, check alternator as follows:
a. Start engine and allow to reach normal operating temperature.
b. Raise engine speed to 2000 RPM, then turn on high beams and set blower speed to high.
c. Amperage should be 30 amps or more. If not, repair alternator. If the battery is in fully charged state, the ammeter may read less than 30 amps.