2 in 1 Power Circuit Probe Tester

Whether you need to check battery voltage, trace short circuits, test wire continuity, identify positive/negative polarity or verify whether your automotive relay is working properly, this all-in-one probe tester handles all tasks efficiently.

✅ 2-IN-1 Integrated Design: Circuit Tester + Relay Tester

No more messy piles of multimeters and separate testing tools. Our DW833 combines complete circuit diagnosis and relay detection into one compact unit, saving your toolbox space and cutting down repair time drastically.

✅ Wide Compatibility: Works on All 12V & 24V Vehicles

Perfect for passenger cars, vans, pickup trucks, heavy-duty trucks, buses, and construction machinery. Ideal for auto repair shops, professional mechanics, electricians and DIY vehicle enthusiasts.

✅ Real-Time LCD Digital Voltage Display

Clear backlit LCD screen shows accurate DC voltage readings instantly. Built-in indicator lights clearly distinguish Polarity:

🔴 Red Light = Positive / Fault Signal

🟢 Green Light = Negative / Normal Circuit

✅ Built-In Dual LED Work Lights

Equipped with two front LED lights. Illuminate dark engine bays, tight wiring compartments and shadowed working areas so you can safely diagnose faults day and night.

✅ Professional Relay Testing Function

Supports testing most common 4-pin & 5-pin 12V/24V automotive relays. Quickly detect common relay failures: coil burnout, contact sticking, abnormal switching and connection defects.

✅ Comprehensive Electrical Test Functions

✅ User-Friendly Handheld Structure

Ergonomic lightweight body for comfortable one-hand operation. Comes with long flexible extension cable + heavy-duty positive/negative alligator clips and sharp probing tip for easy wire piercing and contact testing.