Astro Pneumatic 7898 8pc Deluxe Noid Lite & GM AC Signal Test Lights Set

• The most economic way to check electronic fuel injection (EFI) signals
• Quickly and easily checks for systems of GM TBI, Bosch PFI Ford TBI, GM PFI, Geo TBI and GM SCPI
• To test, just disconnect the fuel injectors, plug the Noid Lite into injector wiring harness then crank the engine
• Normal voltage is indicated by flashing light which is visible from passenger compartment
• Blow molded case for easy storage and transport