| Fig. 1: Fig. 2 Checking the pilot lamp relay
|
| Fig. 2: Checking the constant voltage relay
|
The alternator regulator is composed of two control units: a constant voltage
relay and a pilot lamp relay.
- Use an almost fully charged battery and connect a voltmeter between the A and E terminals
of the regulator.
- Run the engine at 2,000 rpm and read the voltmeter. It should read from
14–15v.
- If not, adjust the voltage relay.
- Using a voltmeter and variable resistor, construct a circuit as shown.
- Light the pilot lamp.
- Slide the knob of the variable resistor so that the voltage gradually increases.
- Read the voltage between the N and E terminals
of the regulator. If the voltage is 3.7–5.7v, it is operating properly.
- Slide the knob of the variable resistor to decrease the voltage. Note the
point on the voltmeter where the light will light again. If the reading is
less than 3.5v, the unit is working properly.
- Disconnect the test instruments.
