Checks for spark in ignition systems without removing spark plug
Testers verify that energy is sufficient for spark plug to fire
Standard Ignition Tester is Calibrated for Standard Ignition Systems Accurately check for spark in ignition systems without removing spark plug from engine. Testers verify that energy is sufficient for spark plug to fire. Attach spark plug wire to tester end. Clamp tester to engine as ground. Crank engine and check for spark.