2 In 1 Automotive Circuit Tester & Car Relay Tester
Feature
✅ 2-in-1 Power Circuit & Relay Testing, Diagnose Problems Faster
✅ 6 DIY Tests: Voltage, Polarity, Continuity, Short Circuit, Leakage & Drive Tests
✅ Dual Visual & Audible Feedback for Clear Test Results
✅ Built-In LED Light for Easy Testing in Dark Areas
✅ Compatible with 12V/24V Vehicles & 4/5-Pin Relays
Specification
Model: DW833
Voltage Range: DC 3.5V–36V
Relay Testing: 12V / 24V Compatible
Relay Types: Standard 4-Pin & 5-Pin Automotive Relays
Display: Digital Voltage Display
Power Supply: Vehicle Battery Power
Operating Temperature: -4°F to 131°F
Package Weight: 0.838 lbs (0.38 kg)
Package Dimensions: 11.81 × 3.15 × 2.56 in (30 × 8 × 6.5 cm)
Package
iToolMax Automotive Circuit Tester × 1
User Manual × 1
Why Choose iToolMax?
🚚Fast, Free Shipping
Free shipping on all items to most locations nationwide.It usually takes 4-7 business days for your package to be delivered, so you can sit back and relax, worry-free.
🔙30-Day Risk-Free Trial
Try it worry-free! Full refund within 30 days if you’re not satisfied.
🔄1 Year Warranty
We provide a one-year warranty to every customer who purchases our products, so you can use them with peace of mind!
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We'll Always be There for You. If you have any questions or concerns, feel free to contact us at support@itoolmax.com or online chat.
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2-in-1 Circuit Tester: Diagnose Faster, Guess Less
Tired of guessing when your vehicle won’t start or electrical parts stop working?
iToolMax 2 In 1 Automotive Circuit Tester combines circuit testing and relay testing in one tool— helping you accurately diagnose a wide range of electrical faults without repeatedly removing parts. Ideal for DIY car owners and professional mechanics.
6 Essential Tests, Complete Vehicle Diagnosis
✅ Voltage Test
✅ Polarity Test
✅ Continuity Test
✅ Short Circuit Test
✅ Leakage Test
✅ Drive Test
Cover a wide range of automotive electrical testing needs with one tool.
Clear Visual & Audible Alerts, Confident Testing
Get instant feedback with LED indicators and a built-in alarm—helping protect your battery and tester while reducing guesswork.
Wide Vehicle Compatibility
Car Relay Tester compatible with 12V/24V vehicle systems and standard 4-pin & 5-pin relays.
🚙 SUVs & Cars
🚚 Trucks & Vans
🏍 Motorcycles
🚜 Off-Road Vehicles
⚙️ Commercial Vehicles
How to Use Automotive Circuit Tester
- Connect
Red clamp to +, black clamp to –. - Test the Circuit
Touch the probe to the test point and read the voltage/polarity. - Test the Relay
Insert a 4-pin or 5-pin relay and check the result.
Even Beginners Can Diagnose with Ease.
FAQ
Can the power circuit probe tester test fuses?
Yes. iToolMax Electric Circuit Tester can test fuse voltage, polarity, and continuity to help identify blown fuses or power-loss issues in DC electrical systems.
Is the electric circuit tester easy to read in the dark?
Yes. iToolMax Automotive Circuit Tester is easy to use in dark areas like engine bays, under dashboards, and tight wiring spaces. The backlit digital display and built-in LED work light make voltage readings clear in low-light conditions.
Does the circuit breake finder have a long cable?
Yes. iToolMax Circuit Breake Finder includes a 14.7 ft extension cable, allowing you to test from the engine bay to the rear of the vehicle without constantly moving the battery connections.
Can the car relay tester test trailer lights?
Yes. iToolMax Car Relay Tester can test trailer lights, vehicle wiring, and other compatible 12V/24V DC electrical systems. It checks voltage, polarity, power, and ground conditions, making it a reliable automotive tool for everyday electrical troubleshooting.
Is the automotive circuit tester easy to use for beginners?
Yes. iToolMax Automotive Circuit Tester uses a simple Connect → Probe → Read process with clear voltage and polarity readings, making it easy for beginners and a useful addition to diy home improvement tools.
