2-IN-1 Circuit & Relay Tester DW833 – 3-36V Circuit Test + 12/24V 4/5 Pin Relay Test with LED Work Light & Polarity Indicator – 3 Colors Available
️ PLEASE READ BEFORE ORDERING – SELECT YOUR COLOR ️
| Please Confirm | Details |
|---|---|
| Package Quantity | 1 Tester per Order |
| Color Options | Red / Blue / Black |
| Circuit Test Voltage | DC 3.5V – 36V |
| Relay Test Voltage | 12V / 24V |
| Supported Relays | 4‑Pin & 5‑Pin |
| ️ Safety | DC Only – Red to Positive (+), Black to Negative (-) |
️ IMPORTANT – COLOR SELECTION: This listing offers Red, Blue, and Black color options. Please select your preferred color before adding to cart. If your desired color is not in stock, please contact us before ordering.
️ CRITICAL – SAFETY NOTES:
This tester is designed for DC 3.5V-36V automotive circuits only. DO NOT connect to household 220V AC power.
Reverse polarity protection is NOT built-in – always connect Red to Positive (+), Black to Negative (-). Reverse connection will damage the unit.
Do not use in rain or allow the unit to get wet.
Relays must be tested in the correct 4‑pin or 5‑pin mode – selecting the wrong mode may result in inaccurate readings.
️ NOTE: This listing includes 1 complete tester – vehicle and relays not included.
Core Product – The Upgraded 2-IN-1 Diagnostic Solution
The DW833 is a professional 2-IN-1 diagnostic tool that combines a circuit tester (3.5‑36V) and a 12V/24V 4/5-pin relay tester in one compact device. Designed for professional mechanics, auto electricians, and DIY enthusiasts, this upgraded tool eliminates the need to carry multiple diagnostic devices.
Why choose the DW833 2-IN-1 tester？
2-IN-1 design – circuit tester + relay tester in one tool
Wide circuit testing range – DC 3.5V to 36V
12V/24V relay testing – supports all standard 4‑pin and 5‑pin automotive relays
Built-in LED work light – clearly illuminate the work area for night testing
Red/Green indicator lights – positive (+), negative (-/ground), and no‑voltage detection
Digital voltage display – high‑definition screen for accurate readings
One‑click positive/negative output switch – quick and convenient circuit testing
Comprehensive diagnostic functions – voltage, polarity, continuity, short circuit, leakage, and drive testing
Universal compatibility – works on 12V passenger cars and 24V trucks, commercial vehicles, and construction machinery
3 color options – Red, Blue, Black – choose your style
Key Features
| Feature | Benefit |
|---|---|
| 2-IN-1 Professional Tool | Combines circuit tester and relay tester in one device – saves space, saves money, increases efficiency |
| Wide Circuit Test Range (3.5-36V) | Works on almost all automotive electrical systems – from sensors to high‑voltage components |
| 12V/24V Relay Testing | Quickly tests all 4‑pin and 5‑pin automotive relays – detects contact sticking, coil burnout, and abnormal engagement |
| Built-in LED Work Light | Bright LED work light illuminates the test area – makes testing at night or in dark engine bays easier and safer |
| Red/Green Indicator Lights | Red light = Positive (+) detection; Green light = Negative (-) / Ground detection; No light = No voltage – instant visual feedback |
| Digital Voltage Display | High‑definition screen shows real‑time voltage readings – accurate and easy to read |
| One‑Click Output Switch | Quickly switch between positive and negative output – simplifies circuit testing |
| Comprehensive Testing Functions | Voltage test, polarity test, continuity test, short circuit test, leakage test, drive test, and relay engagement test – covers all your diagnostic needs |
| Universal Vehicle Compatibility | Works on all 12V passenger cars, 24V trucks, commercial vehicles, and construction machinery – one tool for your entire fleet |
| 3 Color Options | Available in Red, Blue, and Black – choose the color that suits your style |
Specifications – Please Confirm Before Ordering
| Parameter | Value |
|---|---|
| Model | DW833 |
| Brand | Unbranded / Generic |
| Color Options | Red / Blue / Black |
| Circuit Test Voltage | DC 3.5V – 36V |
| Relay Test Voltage | 12V / 24V |
| Supported Relays | 4‑Pin & 5‑Pin |
| Display | Digital Voltage Display |
| Work Light | LED (Built-in) |
| Indicator Lights | Red (+) / Green (-/Ground) |
| Output Switch | One‑Click Positive/Negative Switching |
| Testing Functions | Voltage, Polarity, Continuity, Short Circuit, Leakage, Drive, Relay Engagement |
| Operating Environment | Temperature -20°C ~ +55°C |
| Country of Origin | China |
How to Use – Quick Diagnostic Guide
Circuit Testing (DC 3.5V – 36V):
| Step | Action |
|---|---|
| 1 | Connect power – Attach red clip to battery Positive (+), black clip to Negative (-) |
| 2 | Select mode – Use the one‑click output switch to select Positive or Negative output |
| 3 | Probe the circuit – Touch the probe to the test point – the digital display shows voltage, indicator lights show polarity |
| 4 | Read results – Red light = Positive, Green light = Negative/Ground, No light = No voltage |
Relay Testing (12V/24V 4/5 Pin):
| Step | Action |
|---|---|
| 1 | Select relay mode – Set the switch to 4‑Pin or 5‑Pin according to the relay being tested |
| 2 | Insert relay – Plug the relay into the test socket on the tester |
| 3 | Press test – Press the TEST button – the tester will automatically test for contact sticking, coil burnout, and abnormal engagement |
| 4 | Read results – Visual indicators will show if the relay is good or faulty |
️ Important Safety Notes
| # | Safety Instruction |
|---|---|
| 01 | Low voltage only – DC 3.5V‑36V only. DO NOT connect to 220V AC |
| 02 | Correct polarity – Red to Positive (+), Black to Negative (-) |
| 03 | Avoid heat/moving parts – Do not touch the probe to hot engine parts or moving belts |
| 04 | Keep dry – Do not use in rain or allow the unit to get wet |
| 05 | Do not disassemble – Unauthorized disassembly voids the warranty |
| 06 | Correct relay mode – Always use the correct 4‑pin or 5‑pin mode for accurate readings |
Package Includes
1 × DW833 2-IN-1 Circuit & Relay Tester (color as selected)
1 × Set of Power Clips (Red + Black)
1 × Test Probe
1 × User Manual
Vehicle not included
Relays not included
Professional 2‑IN‑1 design – one tool, two functions
Built-in LED work light – test anytime, day or night
3 colors available – Red, Blue, Black – choose your style
️ LEGAL DISCLAIMER
This automotive circuit and relay tester is a professional diagnostic tool. It is the buyer's responsibility to use this tool safely and in accordance with proper procedures. The seller assumes no liability for improper use, incorrect connection, or any damages resulting from the use of this product. Always follow your vehicle manufacturer's guidelines. If you are unsure about proper use, consult a qualified automotive professional.
Get your DW833 2‑IN‑1 automotive circuit and relay tester today！ Click "Add to Cart" now – choose your color (Red, Blue, or Black) and get the professional diagnostic tool that tests circuits (3.5‑36V) and relays (12V/24V 4/5 pin) with built‑in LED work light.