Note: this check is necessary to determine the value of the current output of the generator and compliance with its nominal value.
1. Check alternator installation and battery condition. Check alternator drive belt tension.
Note: The battery should be slightly discharged. A fully charged battery is not suitable for testing.
2. Turn off the ignition.
3. Disconnect a wire from the negative plug of the storage battery.
4. Disconnect the wire from the terminal «IN» generator.
5. Connect DC ammeter (measurement range 0-100 A) in series between output «IN» generator and disconnected wire.
6. Connect a voltmeter (measurement range 0-20 V): connect wire «+» voltmeter to output «IN», and the wire «-» - To «mass».
7. Connect a tachometer. Connect the previously disconnected cable to the negative battery terminal.
8. Leave the hood open.
9. Make sure the voltmeter reading matches the battery voltage. If the voltmeter shows 0 V, then the probable cause may be an open circuit between the terminal «IN» generator and «-» battery or poor connection to «weight».
10. Start the engine and turn on the headlights.
11. Turn on the high beam headlights and set the heater fan speed control to the maximum speed position. Immediately after this, increase the engine speed to 2500 rpm and read the maximum value of the recoil current from the ammeter. Minimum value: 63 A. If the current is below the minimum value, but the output circuit «IN» generator is serviceable, remove the generator and check it.
Note: Since the output current drops rapidly after starting the motor, the test must be carried out as soon as possible.
12. After checking, let the engine idle and turn off the ignition.
13. Disconnect a wire from the negative plug of the storage battery. Disconnect the ammeter, voltmeter and tachometer.
14. Connect the generator wire to the terminal «IN». Connect the wire to the negative terminal of the battery.