DW833 2-in-1 Automotive Relay & Circuit Tester 12V/24V

DW833 2-in-1 Automotive Relay & Circuit Tester — 12V/24V Universal

Meet the DW833 — a professional-grade, dual-function tool that combines a car circuit detector and a relay fault tester into one compact, easy-to-use device. Whether you're diagnosing passenger cars, commercial trucks, or heavy construction machinery, the DW833 has you covered with its wide DC 3.5V–36V operating range and HD digital voltage display.

Made in Mainland China.

Key Features

• 2-in-1 Dual Capability: Functions as both a car circuit detector and a relay fault tester — eliminating the need for two separate tools in your kit.
• Wide Voltage Range: Operates across DC 3.5V–36V, making it universally compatible with 12V passenger vehicles and 24V trucks, vans, and construction equipment.
• HD Digital Voltage Display: A clear, high-definition readout with polarity indicator provides fast and accurate circuit assessments at a glance.
• 4-Pin & 5-Pin Relay Support: Detects contact faults and coil burn issues across the most common automotive standard relay configurations.
• Built-in LED Work Light: Integrated illumination helps you work confidently in dim engine bays and low-light environments.
• Polarity Output Switch: Positive and negative output switching buttons with polarity indicator lights for precise, safe diagnostics.
• Rugged Build: Waterproof and drop-resistant plastic housing rated for working temperatures from -20°C to +55°C.

Specifications

What's in the Box

• 1 × DW833 Relay & Circuit Tester

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Note: Due to different monitor settings and lighting conditions, the actual product color may vary slightly from images. Please allow a 1–2 cm difference in measurements due to manual measuring.

Learn more: FuelEconomy.gov driving efficiency guidance

Frequently Asked Questions

Q: Is the DW833 automotive relay tester compatible with both 12V and 24V vehicles?

A: Yes, the DW833 relay and circuit tester supports a wide DC 3.5V–36V range, making it fully compatible with 12V passenger cars as well as 24V trucks, commercial vehicles, and construction machinery.

Q: Which relay pin configurations does the DW833 support?

A: The DW833 supports both 4-pin and 5-pin automotive standard relays, covering the most common relay types found in modern vehicles for comprehensive contact fault and coil diagnostics.

Q: Does the DW833 circuit tester come with batteries?

A: No, batteries are not included with the DW833. Please ensure you have the appropriate batteries on hand before use.

Q: Can the DW833 be used in wet or harsh workshop environments?

A: Yes. The DW833 is built with a waterproof and drop-resistant plastic housing and is rated for operation in temperatures ranging from -20°C to +55°C, making it suitable for demanding workshop and field conditions.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.