Power Probe PP401AS Power Probe 4 Automotive Circuit Tester, Colour LCD Menu, Supplies Power/Ground, Multi-Mode Diagnostics (Injector, Ohmmeter, Continuity), AC-RMS/Frequency/Pulse Width, 12-24V

8 ADVANCED DIAGNOSTIC MODES: Combines advanced circuit testing and multimeter-style functions in one tool, helping mechanics analyse AC/DC voltage, resistance, frequency, and pulse width with fast on-screen feedback. POWER FEED & COMPONENT TESTING: Apply battery power or ground for functional checks, then use the Feed Test to assess resistance and voltage drop on live or unloaded circuits during vehicle electrical diagnosis. ADVANCED SIGNAL ANALYSIS: Built-in AC RMS, Peak-to-Peak, Hertz, and positive/negative pulse width readings help technicians easily evaluate sensors, charging circuits, and other signal-driven components. SPECIALISED TEST MODES: Includes Fuel Injector, Driver Test, and PPECT modes to support safe computer module testing and open-circuit signal tracing (when paired with compatible ECT transmitters). WORKSHOP READY DESIGN: Rugged dust and water-resistant housing with a colour LCD, LED lights, auto-resetting 8-amp thermal breaker, and 23ft (7m) cable. Includes carrying case, battery clips, and 3-inch tip.