ITEM NAME:4Pcs In-Line Ignition Lead Spark Plug Coil Circuit Tester Car Van Bike Tool HPE.1 Turn off the engine and disassemble the spark plug coil 2 Connect the black tip of the tester to the spark plug. Product List: Auto Spark Plug Ignition Tester 4. 4 Spark Plugs. 5 If the ignition wire is intact, the indicator light flashes.
