Abstract: An ignition coil tester for testing ignition coils associated with motor vehicles. The ignition coil tester includes an oscillator for simulating an output signal from the ignition module associated with the ignition coil being tested. A short circuit detector is provided for detecting a short circuit within the ignition coil. An open coil indicator is proved for indicating an open circuit within the ignition coil. A series of visual indicators are provided for indicating the strength of a signal being output by the ignition coil.