Ignition Coil Assembly

Fig 1: View Of Ignition Assembly

Courtesy of GENERAL MOTORS CORP.

The ignition coil (2) has a high voltage output terminal and boot, that provides spark directly to the spark plug (3). Each ignition coil assembly has a built-in ignition module, or igniter, that controls the current flow in the primary coil winding. The secondary coil voltage travels directly to the spark plug, increasing secondary ignition voltage by eliminating the spark plug wire.