Checking the ignition coil (Opel Kadett D)

An accurate check of the ignition coil is only possible with the help of a test device for ignition coils. If you do not have such a device, the check can be performed as follows.

Please note: These instructions are only valid for contact ignition systems in 1.0-/1.3-l engines.

Pull the middle cable out of the distributor cap and hold it about 10 mm away from the ground. When turning the engine over with the starter, a spark should jump from the end of the cable.

If the spark does not jump, then check the voltage at terminal 15 of the ignition coil with the ignition on using a voltmeter. This voltage should be 9 V.

If the voltage is higher than the specified value, then using a voltmeter or a simple test lamp, check terminal 1 of the ignition coil to see if there is voltage at this terminal when the breaker contacts are closed and if there is voltage at it when the contacts are open. Closed contacts (crank the engine using the starter) can be opened with a screwdriver.

If the voltmeter needle does not move or the indicator light does not come on when the breaker contacts are open, the ignition coil should be replaced.

[Material taken from an internet portal: Opelbook.ru]