Best Godiag in 2026

【Easy-to-use multi-function probe tester】The main functions of this power circuit probe tester include voltage and polarity test, continuity test, signal circuit test, current test, circuit breaker protection, relay test, injector test and cleaning, component activation and testing, poor ground testing, tracking and locating shorts, etc. It beeps to indicate the result while testing and is the most versatile and practical dedicated circuit repair test tool its users have ever had.

【Best Electrical Tester】This electrical tester can supply power to electrical components, with reverse connection protection circuit, it is an advanced test tool for positive and negative line judgment. It shortens the diagnostic time of all 6 to 40 volt vehicle electrical systems, and is suitable for DC 6-40v cars, motorcycles, trucks, buses, construction vehicles, ships, tractors, mining vehicles and other vehicles that use DC circuits.

【Quick Self Test & Relay Test & Circuit Breaker Protection】GODIAG GT101 circuit tester has quick self test function, which can ensure the tester is in good condition before use. The GT101 Probe Tester Kit can quickly detect whether the relay is normal. The tool has a built-in 10 amp circuit breaker, the input current can be reversed to form a loop power supply, and it automatically trips when the current exceeds 20A, protecting the equipment and extending its life.

💡 Comprehensive Kit, Incredible Savings: Say goodbye to expensive individual purchases! Our probe tester comes with a wide range of accessories at a fraction of the cost. You'll save big while enjoying the convenience of having everything you need in one comprehensive kit.

🚗 Suitable for All Vehicles: Whether you're working on cars, motorcycles, trucks, or even ships and tractors, our tester's DC 6-40v compatibility makes it the ideal solution for diagnosing electrical systems in any vehicle.

🔒 Safety First: Your safety is paramount to us. The circuit tester features a reverse connection protection circuit, providing peace of mind during positive and negative line judgment. Plus, the built-in 10 amp circuit breaker ensures your equipment is safeguarded from excessive current.

🚘【MOST PRACTICAL CIRCUIT TESTER】With the GT103 probe tester, you can test for continuity/polarity/voltage and ground signals/Short&Open Circuit. And most importantly, you can also use it to check switches, relays and the on-off of diodes, fuses and circuits, activating electronic Component. It is the best electrical tester for reducing diagnostic time in all 6-30 volt vehicle electrical systems.

🚘【PORTABLE AND QUICK TEST ELECTRICAL TESTER】With the GT103 car circuit tester tool, you can determine at a glance whether a circuit is positive, negative, short or open; Test for continuity with its built-in auxiliary ground lead; can also easily test the vehicle's headlights, turn signals, lift windows, sunroofs and others, helping you to find out whether it is a circuit problem or a component damage.

🚘【CAR FUEL INJECTOR TESTER & CLEANER】Free DIY Injector Cleaning Adapter Kit included with the package! When the vehicle has difficulty in starting, acceleration and fuel consumption, etc, it is necessary to check the fuel injector. When the injector is clogged, you can also use it to save expensive nozzles, this kit is easily to clean most car motorcycle fuel injectors. Efficient & Labor-free, Save your money!

🚗【Easy Operation】Unroll the leads, clamp the red clip of the power circuit probe tester to the positive terminal of the vehicle's battery and the black clip to the negative terminal of the vehicle's battery. After a simple hook-up of the circuit tracer to the vehicle's battery, automotive technician can conduct a positive or negative battery current to the tip by rocking the power switch forward or backward.

🚗【Short Finder and Locating Test Light】The circuit tester is suitable for diagnostic in all 6V to 30V DC vehicle electrical systems. It can check switches, relays and the on-off of diodes, fuses and circuits, which can help you reduce diagnostic time in automotive electrical systems. In most cases, short circuit or instant overload of component will lead to blown fuse or circuit breaker tripping.This power probe tester can assist you tracing problem wires and locating breaking points.

🚗【Quick Self-Test & Overload Protection】Before you test a circuit or component, the Power Circuit Tester can perform a quick self-test to ensure your tool is in good condition. Equipped with overload protection, when the current exceeds 10A, the circuit tester will disconnect the current automatically and give you a buzzer prompt. You can test poor ground contacts directly. Note: This circuit tester can not be used for 110/220V systems, it is only used for DC 6-30V systems.

【Easy to Operate】After scanning code to download Free Battery Monitor App, connecting Bluetooth and open app, you can know battery or battery load’s condition and check charging and starting system without code. Simply have a check before you go out without hassles on the road.

【Wide Compatible】Bluetooth 4.0 battery assistant is suitable for DIY users, battery service station, garage/workshop, tool store, vehicle/battery manufacturer, including Cars, SUVs, Boats, RVs, Motorcycles, Travel Trailers, Generator, Lawn mower (Just for 6-20V VRLA battery).

【Automatic Reminder】The APP of Battery Monitor 12v will send the battery status to the notification bar (on your phone) when enter bluetooth range (4-5m). Other products are more trouble, need to use traditional methods to connect to computer and then could download your car battery iformation.

Voltbeat technology and continuous self-test - so you always know it is working

Upon detection, tip glows and beeper sounds

CAT IV 1000 V for added protection

DIGITAL CIRCUIT BREAKER FINDER for a panel corresponding to the circuit to which an electrical outlet or fixture is connected

GFCI OUTLET TESTER includes a transmitter connected to the electrical outlet or fixture and a receiver to locate the correct breaker

VISUAL AND AUDIBLE INDICATORS are delivered when the correct breaker has been located

Versatile Digital Multimeter - Accurately measures AC/DC Current, AC/DC Voltage, Capacitance, Frequency, Duty Cycle, Resistance, Diode, Continuity and Temperature

Thoughtful Design - Support Data Hold, Large LCD Backlit Screen, Auto Shut-off and Hanging Magnet, and Kickstand make the process of measurements easier. Professional level is reflected in some features include Auto-Ranging capability, and True RMS for measuring both AC Current and Voltage

Suitable For Many Occasions - This Multimeter is a golden partner to help to troubleshoot a variety of automotive and household electrical problems safely and accurately.

Accuracy: With 3/s Sampling Speed, this multimeter can accurately measure AC/DC Voltage, DC current (Not for AC current), Continuity, Amp, Resistance and Diode

Widely Used: This meter is capable of testing Household Outlets, Batteries (including 12V Automotive Battery), Continuity, Electrical Circuit, Fuses, Wires, Light Bulbs and Water Heaters

Multi-Feature: Large Backlight LCD Display with 3 ½ digits (1999 count) delivers your results clearly in dim light areas; Data Hold button holds a reading; Built-in Stand allows for hand free use; Low Battery Indication and Continuity Buzzer

VERSATILE DIGITAL MULTIMETER - Accurately measures AC/DC Voltage, DC Current, Resistance, and Diode. This Multimeter is a really useful tool for solving industrial and household electrical issues. Suitable for Household Outlets, Fuses, Batteries (including Vehicles), Automotive Circuit Troubleshooting, Charging System, Testing electronics in Cars etc.

TROUBLESHOOTING WITH Accuracy - This Multimeter has a sampling speed of 2 times per second; Built-in a backlight LCD display with 3 ½ digits (1999 count) 0.6”, and high polarity including negative and positive readings.

ENSURES SAFETY - Double ceramic fuse is anti-burn and protects from overloading.The silicone cover is able to protect the multimeter from failing damage and prevent electric shocks. And low battery indication will be displayed when battery power is low.

SAFETY FIRST: It will send out multiple alarms through sound and light. When the voltage is detected, the tip will send out red light and beep. When the higher the sensed voltage is, or the closer it is to the voltage source, it beeps at a higher frequency. At the same time, the screen will be red or green, red means high voltage and live wire are detected, green means low voltage and null wire are detected.

NON-CONTACT: With NCV inductive probe for AC voltage; Just place the tip near a terminal strip, outlet, or supply cord. When the tip glows red and the pen beeps, you know there's voltage present. The live wire detector can automatically detect the live or neutral wire. Ideal for breakpoint Test. Handy circuit tester for electricians, homeowners.

DUAL RANGE: Detects standard and low voltage (12-1000V AC / 48-1000V AC) for more sensitive and flexible measurements. Press the S button to adjust sensitivity and adapt low range for doorbells, thermostats, irrigation wiring etc.; The NCV sensor automatically recognizes the voltage and displays it on the bar graph.

Constructed of black 600d Nylon

Has a heavy-duty PVC zipper and zinc alloy zipper tag

Convenient storage for meters, testers and tools

CL120 Clamp Meter measure AC current via the clamp, and AC/DC voltage, resistance and continuity via test leads

Meter has backlit LCD for ease of viewing in low light and is CAT III 600V, Class 2 Double Insulated

RT210 detects the most common wiring problems in standard and GFCI receptacles

AC VOLTAGE TESTER aligned with commonly used residential voltages from 12 to 240 VAC at four useful levels

TEST DC VOLTAGES from 1.5V to greater than 17 to 24V at four useful levels

BRIGHT LED LIGHTS illumite to indicate the type and level of voltage detected

Power Probe III Circuit Tester is designed to be a multi-functional electrical circuit tester

Quickly and easily diagnose automotive electrical systems

Features: Digital Voltmeter, Min/Max, Audible Circuit Monitoring, 4mm Standard Banana Jack and Auxiliary Ground for component testing. Works with 12 - 24 VDC Systems.

Leading Manufacturer Of High-Quality Products

International Renown For Our Diverse Range Of Award-Winning Products

Fully Equipped With State-Of-The-Art Technology

Automatically measures volts ac and volts dc with precise digital resolution

Displays resistance to 1000Ω

Easy and accurate OpenJaw current measurement

Power Probe III Circuit Tester is designed to be a multi-functional electrical circuit tester

Quickly and easily diagnose automotive electrical systems

Features: Digital Voltmeter, Min/Max, Audible Circuit Monitoring, 4mm Standard Banana Jack and Auxiliary Ground for component testing. Works with 12 - 24 VDC Systems.

A SAFEGUARD OF HOUSEHOLD APPLIANCES: Built in Premium LCD Digital Display with Black Character, this test can immediately detect and measure the current voltage by connecting to the switch plug or the other kind of wall socket. It allows you to check on power health of devices for preventing the low voltage damage to your valuable household appliances.

WIDE MEASURING RANGE & LOW CONSUMPTION: Measuring range: AC80-300V, Consume Power: Less than 1W(about every 1200hours consume 1 kilowatt-hour).2 Prongs Flat US Plug with Compact Size Design is ideally applicable to measuring the AC voltage in family, office space, industrial and mining enterprises, etc.

ADJUSTABLE POTENTIOMETER: There’s an Interior Potentiometer for accuracy adjustment. Just use screwdriver to open the outer coving and adjust the potentiometer with small size screw driver. Adjust potentiometer in counter-clockwise when it’s excessive voltage, but if display voltage is too low, adjust potentiometer in clockwise.

Leading Manufacturer Of High-Quality Products

International Renown For Our Diverse Range Of Award-Winning Products

Fully Equipped With State-Of-The-Art Technology

Measure voltage with or without test leads

Be safer: Measure voltage to 600V through the open fork, without test leads

Be faster: Not need to open covers or remove wire nuts simultaneously measure voltage and current

Includes a professional grade analog tone generator and tracing probe for open-ended, non-energized wiring

Toner-Pro features 5 distinct tone cadences, transmits 1,000+ feet

Rugged Angled Bed of Nails (ABN) clips securely attach to wires

WIDE APPLICATIONS - The AstroAI M4K0R Multimeter accurately measures AC/DC voltage to 600V, Current to 10A, Resistance to 40MΩ. You can use it for continuity test, diode test, battery test and live wire test. Includes 1.5V, 9V and 12V battery test modes to easily test a wide variety of batteries. Multimeter light turns red for low voltage and green for enough voltage.

NON-CONTACT - Fully safe non-contact voltage testing with sound and light alarms. You can detects AC voltage without the use of test leads. Uses NCV function：When the Meter senses a strong AC signal, the red indicator light will turn on and the buzzer will emit a quick beep.

THOUGHTFUL DESIGN - Support Data Hold, Max, Auto Shut-off, low battery indicator and continuity buzzer. Includes Convenient features like Audial and Visual Alarm, LCD Backlit Screen and Flashlight make it easy to use. Two 1.5V AAA batteries are included in the package.

Southwire Pen style voltage tester

AUDIBLE AND VISUAL INDICATION of AC voltage from 100-600V AC

INCREASED BATTERY LIFE: the auto power off feature increases the battery life by powering off after 5 minuets of inactivity

Basic dc accuracy 0.5%

CAT III 600 V safety rated

Diode and continuity test with buzzer

Safety—Measure ac voltage, current, frequency without touching a live wire

Faster answers—Troubleshoot with all power supply measurements at-a-glance

More information—See ac voltage and current values at the same time

[UNIQUE DESIGN- ANTI-LOST NEEDLE GUARD PROTECTION]: Adopt the integrated structure design of the probe protection cover, needle guard function is added to ensure that there will be no stab wounds and the guard will not be lost. Convenient to carry and take it wherever you go.

[LED INDICATION, BIDIRECTIONAL VOLTAGE TESTING]: This upgrade circuit test light is a bidirectional voltage tester. You can attach the alligator clamp either to negative or positive ground, there is also a light emitting diode on the circuit board for polarity indication, red light indicates positive polarity and green light indicates negative polarity.

[WIDER VOLTAGE RANGE] Compared with the auto electrical tester on the market, the maximum voltage measured is only 48V, but the maximum voltage that our technology can measure is upgraded to 60V. AWBLIN circuit test is ideal for checking various vehicles electrical circuits, quickly check automotive headlights, taillights, turn signal circuits, faulty sockets, fuse connections, also for testing other 3-60V DC wirings and circuits.

Power Probe III Circuit Tester is designed to be a multi-functional electrical circuit tester

Quickly and easily diagnose automotive electrical systems

Features: Digital Voltmeter, Min/Max, Audible Circuit Monitoring, 4mm Standard Banana Jack and Auxiliary Ground for component testing. Works with 12 - 24 VDC Systems.

GFCI Tester detects the most common wiring faults in standard, AFCI, and GFCI electrical outlets

Test AFCI devices by simulating arc fault conditions

Test GFCI devices by simulating ground fault conditions

Cable tester tests coaxial cable and maps up to 4 locations

Simple push button operation

Easy-to-read LED panel indicates PASS, OPEN or SHORT conditions and the location of each cable