DW833 2-in-1 Automotive Circuit & Relay Tester – Upgraded Professional Diagnostic Tool with LED Work Light, Digital Display, 3-36V Circuit Probe, 4/5 Pin Relay Tester – for 12V/24V Vehicles
️ PLEASE READ BEFORE ORDERING – IMPORTANT SAFETY INFORMATION ️
| Please Confirm | Details |
|---|---|
| Package Quantity | 1 Tester per Order |
| Circuit Test Voltage | DC 3.5V – 36V (DO NOT use on 220V AC) |
| Relay Test Voltage | 12V / 24V |
| Supported Relays | 4-Pin & 5-Pin |
| ️ Safety | Red to Positive (+), Black to Negative (-) – Reverse polarity will damage the unit |
️ CRITICAL – SAFETY & COMPATIBILITY NOTES:
This tester is designed for DC 3.5V-36V automotive circuits only. DO NOT connect to household 220V AC power – this will cause damage and risk electric shock.
Reverse polarity protection is NOT built-in – always connect Red to Positive (+), Black to Negative (-).
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.
Do not disassemble or modify the unit – unauthorized disassembly voids the warranty.
️ NOTE: This listing includes 1 complete tester – vehicle and relays not included. The unit is designed for professional automotive diagnostics.
Core Product – The Upgraded 2-in-1 Diagnostic Solution
The DW833 Automotive Circuit & Relay Tester 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？
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2-in-1 design – circuit tester + relay tester in one tool
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Wide circuit testing range – DC 3.5V to 36V
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12V/24V relay testing – supports all standard 4‑pin and 5‑pin automotive relays
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Built-in LED work light – clearly illuminate the work area for night testing
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Red/Green indicator lights – positive (+), negative (-/ground), and no‑voltage detection
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Digital voltage display – high‑definition screen for accurate readings
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One‑click positive/negative output switch – quick and convenient circuit testing
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Comprehensive diagnostic functions – voltage, polarity, continuity, short circuit, leakage, and drive testing
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Universal compatibility – works on 12V passenger cars and 24V trucks, commercial vehicles, and construction machinery
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 3.5V to 36V, covers everything 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 |
| ️ Built-in Safety Features | Moisture‑proof and shock‑resistant design – built for workshop and field conditions |
Specifications – Please Confirm Before Ordering
| Parameter | Value |
|---|---|
| Model | DW833 |
| Brand | Lingxiang |
| 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 (Positive) / Green (Negative/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 |
| Dimensions | 30 × 12 × 5 cm |
| Weight | Approx. 310g |
| 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
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1 × DW833 Automotive Circuit & Relay Tester
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1 × Set of Power Clips (Red + Black)
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1 × Test Probe
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1 × User Manual
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Vehicle not included
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Relays not included
Why Buy From Us？
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Fast shipping from China with tracking number
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30‑day money‑back guarantee – no questions asked
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24/7 responsive customer support
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Professional 2‑in‑1 design – one tool, two functions
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Built-in LED work light – test anytime, day or night
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Upgraded model – the latest DW833 with improved features
️ 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 – the professional diagnostic tool that tests circuits (3.5‑36V) and relays (12V/24V 4/5 pin) with built‑in LED work light. Upgraded and built to last！
