Output Current Test

Fig. 14 Alternator Output Test Connection. Battery Voltage Type Sensor:

1. With ignition switch in OFF position, disconnect battery cables.
2. Disconnect wire from terminal B of alternator, then connect an ammeter between battery positive cable and alternator B terminal.
3. Connect a voltmeter between B terminal and ground.
4. Connect battery ground cable to battery ground post, note voltmeter reading. The voltmeter should indicate battery voltage.
5. Connect a tachometer to engine, then START engine and turn ON lights and heater blower to high.
6. Operate engine at approximately 2500 RPM and note ammeter reading. Reading must be higher than limit value. Refer to specifications on alternator nameplate. After engine is started, the ammeter reading should gradually decrease as the battery approaches a fully charged condition. Read the ammeter indication at its maximum value while increasing engine RPM.