Checking electrical characteristics

Voltage test

Using a voltmeter, measure the voltage at the following four points in sequence:

• ignition on voltage «U» at the battery terminals must be at least 11 V;
• voltage value «U ₁» on terminal «+» ignition coil must be equal to the voltage value «U». If «U ₁» equal to 0, it means that the supply voltage is not applied to the coil;
• voltage «U ₂» between terminals «+» And «-» coil must be equal to 0. Otherwise, the switch or wire No. 3 coming from the ignition coil to the first terminal of the switch connector block is shorted to «mass».

Checking the ignition coil

Check the resistance of the secondary winding with an ohmmeter, which should be in the range of 10-30 kOhm, and make sure that there is no short circuit to «mass» car.