Checking an ignition coil with a multimeter is a crucial step in diagnosing ignition system problems. The ignition coil is responsible for converting the vehicle’s battery voltage to the high voltage required to create a spark at the spark plugs. A faulty ignition coil can cause a variety of problems, including engine misfires, rough idling, and poor fuel economy.
Using a multimeter to check an ignition coil is a relatively simple process. Here are the steps involved: