Astro Pneumatic 7898 Deluxe Noid Lite and 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