Checking the regulated voltage

The purpose of this test is to verify the voltage defined by the electronic voltage regulator.

Preparation

Before testing, check, fully charged battery and alternator drive belt tension, if necessary, adjust them.

Switch off the ignition.

Disconnect the negative battery terminal.

Connect a digital voltmeter between the terminal ?�S?� (?�L?�) generator and "weight". Connect the positive lead of the voltmeter to the conclusion ?�S?� (?�L?�) generator and the negative - to the "weight" or the negative terminal of the battery.

Disconnect the output "B" of the generator.

Connect the DC ammeter to measure the limit of up to 100 A in series between the output of the "B" and the generator disconnected output wire.

Connect the tachometer wire to the negative terminal of the battery.

Check

Turn on the ignition and check that the voltmeter shows battery voltage.

If it reads 0, may open circuit in the wire between terminal ?�S?� (?�L?�) generator and the positive terminal of the battery or blown fuse.

Start up the engine and turn off the headlights and all appliances.

Run the engine at engine speed 2500 ^min -1 and fix the voltmeter reading when the current output of the generator is reduced to 10 A.

Result

If the voltmeter reading matches the value given in Table. 10.2, then the voltage regulator is operating normally.

Table 10.2

The dependence of the voltage of the generator, the ambient temperature of the voltage regulator

Otherwise, a voltage regulator or generator faulty.

Upon completion of this test, reduce the speed of the crankshaft of the engine to idle speed and switch off the ignition.

Disconnect the negative battery terminal.

Disconnect the ammeter, voltmeter and tachometer.

Attach the wire to the "B" of the generator.

Attach the wire to the negative terminal of the battery.