The Power Probe 4 is a multi-use Circuit Tester with built-in diagnostic power.

This tool simplifies the testing of fuse boxes, verifies correct operation of motors, lights, relays, sensors, wires, communications circuits and computer drivers. The large LCD colour display makes viewing live test information and mode selection simplified in even direct sunlight or complete darkness.

• Supplies Power and Ground
• Digital voltmeter with Min/Max voltage capturing
• 20 ft power lead
• Tests for bad grounds / short circuits
• Powered by vehicle battery
• Gold plated brass probe tip
• Directed LED head lamps to illuminate test area
• Ohmeter / Frequency
• Pulse width (+tive & -tive)

Additional diagnostic modes:

• Petrol fuel injection tester
• PCM / ECM driver tester
• Signal tracer (use with ECT3000)

Remove guesswork from modern vehicle diagnostics by putting every OBDII circuit at your fingertips. This professional breakout box gives technicians instant access to every OBDII circuit for faster fault finding, ECU testing, and network diagnostics. Whether you're diagnosing communication faults, testing CAN bus systems, performing ECU bench testing, or verifying vehicle power and ground circuits, the ET3142 provides the visibility and control that standard scan tools simply can't offer.

Featuring a built-in LCD display with real-time True RMS voltage monitoring across all 16 OBD-II pins, the ET3142 allows technicians to instantly identify power supply issues, ground faults, CAN communication activity, and wiring problems without repeatedly probing connectors. Dynamic signal detection, audible voltage alarms, and ground status indicators help reduce diagnostic time and improve accuracy.

The integrated 120 CAN termination switches make the ET3142 an invaluable tool for ECU bench testing and module diagnostics. By providing proper CAN network termination, technicians can test modules off the vehicle with improved signal integrity and confidence. Compatible with both 12V and 24V systems, it is suitable for passenger vehicles, trucks, buses, and commercial equipment.

• Real Time VRMS Voltage Monitoring - displays real time True RMS voltage on all 16 OBDII pins
• Built In CAN Termination for Bench & ECU Testing - an onboard 120 ohm CAN termination switch is ideal for situations where termination is missing such as single ECU or small bench networks.
• Intelligent Voltage Protection & Audible Alarm System - reverse polarity protection, automatic alarms for over voltage and under voltage conditions, and support for currents up to 2A, ensures that both the vehicle and diagnostic tools stay protected during testing.

Replacement self resetting circuit breaker for the Power Probe 4.

• Original part # PC8A

Replacement fuse holder for the Power Probe 4.

This set comprises a universal 4mm wire and alligator clip connector.

• Original part # PNECT057

The Power Probe PPTK0042 is a 5-pack of 20 Amp fast-blow fuses designed specifically for the Power Probe 4 (and Hook). These field-replaceable fuses ensure reliable circuit protection, keeping your diagnostic tool operational. Ideal for automotive technicians, this pack offers dependable performance and easy installation.

• 5 pack

The Power Probe PPTK0021 is a 2-pack of replacement rocker switches designed for Power Probe 3, 3EZ, and 4 models. These OEM-quality switches ensure reliable operation, allowing easy replacement of worn or damaged components. Perfect for automotive technicians, they restore functionality to your diagnostic tool with a secure fit and durable design.

• Old part # PN005
• 2 pack

Replacement switch latch to suit Power Probe 3 circuit testers.

• 2 pack
• Original code: PPSL3