Astro Pneumatic 7898 Deluxe Noid Lite and GM Signal Test Lights Set
Astro Pneumatic's deluxe noid lite and GM AC signal test lights set quickly and easily checks for systems on GM TBI, Bosch PFI, Ford TBI, GM PFI, Geo PFI and GM SCPI. To test, just disconnect the fuel injectors, plug the Noid Lite into injector wiring harness, then crank the engine.