P100 Automotive Circuit Tester Kit — Professional handheld tool for diagnosing and activating vehicle electrical components Key benefits Quickly identify faulty parts by directly activating and testing components, eliminating guesswork and saving diagnostic time. Works with on-board and off-board electrical systems and equipment, so you can test parts both in the vehicle and on the bench. Designed for car technicians and automotive enthusiasts who need a reliable, easy-to-use circuit breaker finder and tester. What it does Activates the signal generated by a component so you can determine if the component itself is functioning or if the problem is elsewhere in the circuit. Can be used to energize parts in your hand, while installed in the vehicle, or with a chassis ground connection. Functions as both a circuit breaker finder and an activation tester for a variety of automotive components. Applications and common use scenarios Diagnose a blower motor by applying the tester to the motor or connector to confirm it runs when energized. Verify power window motors, windshield wipers, rear window defrosters, lights, radiator fans, and other driven components by activating them directly. Check fuel injectors and other fuel system components by sending a test signal to confirm operation without removing or replacing parts unnecessarily. Why choose the P100 Purpose-built for automotive electrical troubleshooting — simple, practical, and focused on function. Handheld and portable for shop or roadside use; allows in-vehicle and bench testing without complex setup. Helps isolate wiring or control module faults by proving whether the component itself responds when energized. What to expect in use Connect the tester per component or circuit access point, provide a ground as needed, and observe component operation to determine condition. Use the P100 as part of a systematic diagnostic approach to avoid unnecessary part replacements and reduce repair time. Compatibility and suitability Intended for use with automotive electrical components and systems; appropriate for professional technicians and DIY enthusiasts who need a dependable circuit tester and breaker finder. Note: Follow standard safety procedures and vehicle manufacturer guidance when testing electrical systems.