DW833 2-in-1 Automotive Relay & Circuit Tester

Stop carrying multiple diagnostic tools for auto electrical work. This upgraded compact tester combines a 3.5-36V circuit probe and a 12V/24V 4/5 pin relay tester in one device. Ideal for professional mechanics, auto electricians and DIY car enthusiasts.

 

Key Features

• ✅ 2-in-1 Multifunction: Circuit tester + relay tester in one unit, covers all common automotive electrical diagnostics
• ✅ Wide Test Range: Supports DC 3.5V-36V circuit testing, and 12V / 24V 4-pin & 5-pin automotive relay testing
• ✅ Built-in LED Work Light: Bright integrated LED illuminates dark engine bays and tight spaces for night testing
• ✅ Clear Digital Display: High-contrast LCD shows real-time voltage, delivering accurate and intuitive readings
• ✅ One-Click Output Switch: Fast toggle between positive and negative output for quick polarity & continuity tests
• ✅ Comprehensive Diagnostics: Tests voltage, polarity, continuity, short circuit, leakage, drive and relay engagement
• ✅ Universal Fit: Works on 12V passenger cars, 24V trucks, commercial vehicles and construction machinery

 

Full Specifications

Parameter	Details
Model	DW833
Brand	Lingxiang
Circuit Test Range	DC 3.5V – 36V (NOT for 220V AC)
Relay Test Voltage	12V / 24V
Supported Relays	4-Pin & 5-Pin automotive relays
Display	Digital voltage LCD screen
Indicator Lights	Red = Positive (+) / Green = Negative (-) / Ground
Work Light	Built-in LED
Operating Temp	-20°C ~ +55°C
Weight	Approx. 310g
Dimensions	30 × 12 × 5 cm

 

Easy Operation Guide

Circuit Testing (DC 3.5V – 36V)

1. Connect power: Red clip to battery Positive (+), black clip to Negative (-)
2. Select output mode with the one-click switch
3. Touch probe to test point — display shows voltage, indicator lights show polarity
4. Read results: Red = Positive, Green = Negative/Ground, No light = No voltage

Relay Testing (12V/24V 4/5 Pin)

1. Set switch to match 4-Pin or 5-Pin relay type
2. Plug the relay into the test socket on the tester
3. Press TEST button — automatically checks for sticking contacts, coil burnout and abnormal engagement
4. Visual indicators confirm if the relay is good or faulty

 

⚠️ Important Safety Information

• DC use ONLY: Never connect to 220V AC household power — causes permanent damage and electric shock risk
• Correct polarity required: No built-in reverse polarity protection. Always match Red to Positive, Black to Negative
• Keep device dry. Do not use in rain or wet environments
• Do not disassemble or modify — unauthorized disassembly voids warranty
• Always select the correct relay mode for accurate results

 

Package Includes

• 1 × DW833 Automotive Circuit & Relay Tester
• 1 × Set of power clips (Red + Black)
• 1 × Test probe
• 1 × User manual
  Vehicle and relays are NOT included

 

Service Guarantee

• Fast shipping with full tracking number
• 30-day hassle-free money-back guarantee
• 24/7 responsive customer support — replies within 24 hours
• Professional technical support for all product questions

Legal Disclaimer

This is a professional automotive diagnostic tool. Buyer is responsible for safe operation and following proper procedures. Seller assumes no liability for improper use, incorrect connection, or any damages resulting from use. Always follow vehicle manufacturer guidelines. Consult a certified technician if you are unsure of proper use.