Untested This is an Astro Pneumatic 7872 6-piece deluxe noid lite set used for automotive diagnostics. Used to check electronic fuel injection (EFI) signals. Works with systems including GM TBI, Bosch PFI, Ford TBI, GM PFI, Geo TBI, and GM SCPI. To test, disconnect the fuel injector, plug the noid lite into the injector wiring harness, and crank the engine. A flashing light indicates normal voltage. (This was at my Grandpa’s house when he passed away, it appears to be in good shape)
