At Power Probe, we believe things should be simple. That’s why we design tools to make complex automotive technology accessible for the modern auto technician. As automotive technology continues to evolve, Power Probe will provide innovative Technology, Energy, and Knowledge solutions for technicians and consumers alike.

By Power Probe

Prepare to leave your other tools on the bench. Once you connect Power Probe tools to your car battery you will have access to an amazing variety of diagnostic functions.

What does it do?

With the press of a switch youll have an instant hot lead or ground lead. Use the probe tip and ground lead simultaneously to power up components right in your hand. Instantly check components for continuity as well as identify positive, negative and open circuits without re-polarizing hook-up clips. Locate shorts without wasting fuses.

Power Probe 4 manual

Power Probe provides innovative Technology, Engineering, and Knowledge solutions for technicians and consumers.

AC-RMS, AC Peak to Peak, Frequency and Pulse Width indicators are available for signal testing
Fuel Injector tester for easy circuit diagnosis
PCM/ECM Driver supplies safe voltage for testing computer driver circuits
PPECT Mode for signal detection of open circuits ( When used with the ECT2000/ECT3000 )
Active LED Lighting for illuminating workspace
Power Cable Length of 23 Feet

Power Probe 4

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.

Compared to Power Probe 3 series, the larger LCD color display makes viewing live test information and mode selection simplified in even direct sunlight or complete darkness. More functions are added: Ohmmeter/Frequency/Injector/Driver/ECT Test Mode.

Features :

Supply Power or Ground for Functional Component Testing
Self-Resetting Thermal 8 Amp Circuit Breaker
Multiple DC Volt readings on the same display
Ohmmeter provide active feedback
12 – 24 Volt Range
Bad Ground Indicator
Continuity Tester
Component Tester


Testing and Measuring Operations AC Voltage Measurement (RMS) AC RMS mode is for measuring AC (alternating current) voltages and can be used on any AC voltage or pulsed waveform signal where an RMS averaged voltage measurement is required. Contact the probe tip to the circuit and it will display an RMS averaged AC voltage reading in the main display area while also displaying RMS Min/Max AC voltages on the bottom line. Powering up and activating circuits with the rocker switch can not be performed in this mode. Pressing the “CLR” button will reset the Min/Max read-ings. AC RMS Voltage is used in the same manner as a standard DVOM would be used to measure the averaged AC volt-age in any circuit that produces AC voltage. This can be used for, but not limited to, tests such as checking alternator diode ripple, abs sensors, crank sensors, etc. The Power Probe IV can safely measure up to 70 VAC.	Testing and Measuring Operations AC Voltage Measurement (P to P) P-P mode can be used on any AC voltage signal where a Peak to Peak (P-P) voltage measurement is required. P-P stands for Peak to Peak AC voltage. Where AC RMS displays an averaged AC voltage, P-P does not average the reading but displays the total voltage difference from the lowest to highest voltage extreme on an AC signal. In this mode, the display will be an AC Voltmeter that shows the Tip Voltage in the center and the Min/Max voltage readings along the bottom of the display. The voltage displayed is the total voltage potential between the lowest and highest voltage sensed on the AC signal be-ing measured. Powering up and activating circuits with the rocker switch can not be performed in this mode. The total Peak to Peak voltage will be shown in the main display area. The Min voltage will display lowest absolute voltage on the bottom left of the display and the Max volt-age will display the highest absolute voltage on the bottom right of the display.	Testing and Measuring Operations Frequency Measurement Hz FRQ CTR – Frequency Counter mode is used for mea-suring the frequency of an alternating voltage signal. Contact the probe tip to the circuit and it will display the frequency in Hertz (cycles per second) in the main display area while also displaying the – Pulse Width and + Pulse Width in milliseconds on the bottom line. The Power Probe IV can measure frequencies from 1Hz to 9999Hz. FRQ CTR can be used for tests where frequency or pulse width are needed such as MAF sensors, wheel sensors, etc.


	Power Probe 3	Power Probe 3EZ	Power Probe 4	The MAESTRO

Customer Reviews	2,043	103	1,508	164
Price	$139.99	—	$236.63	$278.87
Voltage Rating	12-24 VDC	12-24 VDC	12-24 VDC	9-30 VDC
Display Type	1 Line LCD Display	Color Multi-Line LCD Display	Color Multi-Line LCD Display	Color Multi-Line LCD Display
Circuit Breaker	Manual Reset	Manual Reset	Self-Resetting	Self-Resetting
DC Voltmeter	0 – 70 VDC	0 – 70 VDC	0 – 200 VDC	0 – 200 VDC
DC Min/Max	Min & Max	Min & Max	Avg, Min, Max Simultaneously	Avg, Min, Max Simultaneously
AC Voltmeter	0.1 to 70.0 VAC (Peak-Peak)	0.1 to 70.0 VAC (Peak-Peak)	0.01 to 199.9 VAC (RMS or Peak-Peak)	0.01 to 199.9 VAC (RMS or Peak-Peak)
AC Min/Max	No	No	Avg, Min, Max Simultaneously	Avg, Min, Max Simultaneously
Ohmmeter	No	No	0.1 to 10K ohms	0.1 to 10K ohms
Frequency (HZ)	No	No	1Hz to 9999Hz/PW	1Hz to 9999Hz/Duty%/PW
Injector/Driver/ECT Test Mode	No	No	Yes	Yes (Display Waveforms)

Power Probe provides innovative Technology, Engineering, and Knowledge solutions for technicians and consumers.

Power Probe 4

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

Testing and Measuring Operations AC Voltage Measurement (RMS)

Testing and Measuring Operations AC Voltage Measurement (P to P)

Testing and Measuring Operations Frequency Measurement

Product information