Use on GM, Ford, AMC, Chrysler, and most import electronic fuel injection systems. Provides access point for EFI components using “Bosch” style connector. Allows testing: fuel injectors, thermal time switch, cold start injector, temperature sending unit, coolant temperature sending unit, and auxiliary air valve. Tests that can be made include resistance, voltage drop, current, pulse width, and scope pattern. Connects between component and wire harness. Also for use as an ignition coil test adapter on 1.5 and 1.8 liter engines on 1990 and up Chrysler Colt, Mirage and Summit. Allows hookup to ignition coil primary for ignition system diagnosis. 12” test leads allow easy attachment of test equipment.