Product Description 32pc MASTER DIESEL ENGINE HIGH PRESSURE COMMON RAIL TESTER KIT Checks Fuel Injector Signal Faults Fast & Easily 10 noid light plug designs to suit GM, Bosch, Ford & some other injectors Noid lights 120cm long with noid light cap for hidden injectors Checks electrical system connectors to injectors Tests the Electronic Control Module for the Idle Air-control (IAC) Motor on GM vehicles