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Description

Stop Guessing.
Find Electrical Faults Faster.

Test circuits, identify polarity, activate compatible components and diagnose common automotive relays with one powerful tool.

Real-Time Voltage Instant Polarity Relay Testing Component Activation

3-in-1 automotive circuit and relay diagnostic tester

Too Many Tools. Too Much Time.

Stop Switching Between Multiple Testers

Traditional electrical diagnosis often means tangled leads, repeated setup and constant switching between meters, probes and relay tools.

One organized diagnostic system

Spend less time setting up tools and more time identifying the actual fault.

Comparison between multiple electrical testers and one all-in-one automotive diagnostic tool

See the Circuit Clearly

Get Voltage and Polarity Answers in Seconds

The backlit LCD displays real-time DC voltage while the red and green indicators help identify power and ground without repeated range changes.

Real-time DC voltage display
Red indication for positive or power
Green indication for negative or ground
Faster checks across complex vehicle wiring

Automotive circuit tester displaying real-time voltage and polarity

Test Before You Replace

Find Out Whether the Part Is Actually Bad

Apply positive or negative battery power through the probe to test compatible lights, motors, fans and other DC components.

Separate wiring problems from component failures
Avoid replacing parts that still work
Verify compatible components directly
Reduce unnecessary repair costs and wasted time

Automotive power probe activating and testing a vehicle component

Dedicated Relay Diagnostics

Test Common Automotive Relays With Confidence

Use the integrated relay testing area to check selected common 4-pin and 5-pin automotive relays before installing replacements.

Check relay coil operation
Identify abnormal engagement
Detect faulty or sticking contacts
Reduce trial-and-error part swapping

Testing a 4-pin or 5-pin automotive relay with the integrated relay tester

Built for Real Repair Conditions

See the Connection—Even in Dark, Tight Spaces

Dual LEDs near the probe tip illuminate wires, connectors and terminals under dashboards, inside engine bays and around hard-to-see components.

Focused light directly around the test point
Better visibility around hidden terminals
Ideal for engine bays and under-dash repairs
Less dependence on a separate flashlight

Dual LED automotive circuit probe illuminating a dark engine compartment

Wide Vehicle Compatibility

One Diagnostic Tool for 12V and 24V Systems

Designed for compatible DC electrical systems across personal, recreational and commercial vehicles.

Cars & SUVs

Pickup Trucks

Vans

Motorcycles

RVs & Campers

Commercial Trucks

Boats

Construction Vehicles

Fleet Maintenance

Simple Diagnostic Workflow

Connect. Probe. Diagnose.

1 Connect to the Battery

Attach the red and black clamps to a compatible 12V or 24V DC vehicle battery.

2 Touch the Test Point

Probe the wire, terminal, fuse, connector or compatible component you need to test.

3 Read and Diagnose

Use the LCD, polarity indicators, continuity response and test controls to locate the issue.

Product Highlights

Fewer Tools. Faster Answers. Better Repairs.

Combines circuit testing, component activation and relay diagnostics
Real-time DC voltage readings on a backlit LCD
Automatic positive and negative polarity indication
Continuity and circuit condition testing
Positive and negative component activation controls
Testing for selected common 4-pin and 5-pin relays
Dual LED illumination around the probe tip
Built-in overload protection
Long cable for extended access around the vehicle
Compatible with supported 12V and 24V DC systems

Technical Information

Specifications

Product Type	Automotive Power Circuit Probe & Relay Tester
Diagnostic Functions	Voltage Test • Polarity Detection • Continuity Test • Component Activation • Relay Test
Voltage Range	DC 3.5–36V
System Compatibility	Compatible 12V and 24V DC vehicle systems
Rated Current	1–8A
Overload Protection	Integrated protection up to approximately 8A
Relay Compatibility	Selected common 4-pin and 5-pin 12V/24V automotive relays
Display	Backlit digital LCD with polarity indicators
Work Light	Dual LED probe illumination
Operating Temperature	Approximately -10°C to 60°C
Relative Humidity	≤80%
Power Source	Connected vehicle battery
Package Includes	1 × Circuit & Relay Tester 1 × Long Power Cable 1 × Red Battery Clamp 1 × Black Battery Clamp 1 × Probe Tip 1 × User Manual
Great For	Mechanics • Automotive Electricians • Repair Shops • Mobile Technicians • Fleet Maintenance • DIY Vehicle Owners

Important: For compatible DC automotive electrical systems only. Do not connect to household AC voltage. Confirm vehicle and component specifications before applying power through the probe.

Frequently Asked Questions

What You Need to Know

Does it work with both 12V and 24V vehicles?

Yes. It is designed for compatible 12V and 24V DC vehicle electrical systems.

Can it test automotive relays?

It includes an integrated testing area for selected common 4-pin and 5-pin automotive relays. Always verify the relay layout before testing.

Can it power a fan, light or motor?

It can apply positive or negative battery current to compatible DC components for diagnostic purposes. Confirm the component rating first.

Does it replace a professional multimeter?

It replaces several common automotive diagnostic tools, but it is not intended to replace every function of a full multimeter, oscilloscope or manufacturer-specific scan tool.

Can it be used on household outlets?

No. This tester is intended for compatible automotive DC circuits only. Never use it on AC household wiring.

Who is this tool best suited for?

It is useful for mechanics, automotive electricians, repair shops, mobile technicians, fleet maintenance teams and experienced DIY users.

One Tool. Complete Control.

Save Time, Find Faults Faster and Repair With Confidence

Upgrade your toolbox with an all-in-one diagnostic system built to make automotive electrical troubleshooting faster, cleaner and more controlled.

Complete 3-in-1 automotive circuit and relay tester kit

Stop Guessing. Start Diagnosing.

Find the Fault Before You Replace the Part

Carry fewer tools, get clearer answers and take control of your next automotive electrical repair.

TEST SMARTER • REPAIR BETTER • DRIVE CONFIDENT

Our Shipping Promise

We carefully process every order within 2–3 business days and provide full tracking information once your package has been dispatched.

Processing Time: 2–3 Business Days
Standard Delivery: 11–18 Business Days
Worldwide Shipping Available

We partner with trusted international carriers to ensure your order arrives safely and efficiently.

Your satisfaction is important to us

Shop with confidence knowing we're here to help every step of the way.

Cancel orders before shipment for a full refund
Easy 14-day return policy
Fast refund processing after return approval
Friendly customer support at contact@vicentaus.com

Tracking & Secure Packaging

We are committed to providing a reliable and transparent shipping experience for every customer.

Order Tracking Available
Once your order has been shipped, you will receive a tracking number via email so you can monitor your package every step of the way.
Customer Support
If you have any questions regarding your shipment, please contact us at contact@vicentaus.com and our support team will be happy to assist you.