1807In-Line Spark Plug Tester


Test for no spark condition.
With CE and RoHS Approval.
Handy pocket screw driver type.
Checks dead spark plugs in automotive.
Essential for trouble shooting all internal combustion engines.


  1. With engine off, remove spark plug wire.
  2. Attach black connector to spark plug.
  3. Insert metal end of tester into spark plug wire.
  4. Start the engine.
  5. If ignition circuit is complete, bulb will flash.