15% Off Your First Order+Use Code: AW2025
15% Off Your First Order+Use Code: AW2025
15% Off Your First Order+Use Code: AW2025
15% Off Your First Order+Use Code: AW2025
15% Off Your First Order+Use Code: AW2025
15% Off Your First Order+Use Code: AW2025
15% Off Your First Order+Use Code: AW2025
15% Off Your First Order+Use Code: AW2025
15% Off Your First Order+Use Code: AW2025

Upgraded Trailer Brake Tester DC 3-72V Circuit Tester with LED Display

Regular price $16.99 USD
Regular price $19.99 USD -15% Sale price $16.99 USD
In stock - 1000 items available
Usually ships within 24 hours

Dear Customer,

Thank you for your interest in our store!

If you have specific requirements or need bulk pricing, please feel free to contact us. Our team is here to assist you and provide the best possible pricing tailored to your needs.

Product details

  • Type Vehicle Battery Testers
  • Vendor Aurawins
  • SKU B0BTP14VT8
If you have any problems you can contact us with this link

==>WhatsApp us

3-72V automotive test light
digital test light with voltmeter


test light with indicates light

3-72V and Bidirectional Voltage Testing

With 3-72V DC voltage testing range, attach the alligator clamp either to negative or positive ground, red and green light indicates circuits' polarity.

buzzer sound test light voltage tester

Buzzing Sound Alarm

When doing volt testing, one sound buzzing for positive voltage direction and double sound for negative.

anti-lost probe cover

Anti-lost Probe Cover

Anti-lost Silica Gel Needle Cover was designed as a part of the spring wire, no worry about losing it during testing or storage.

spring wire test light

140 Inch Long Enough PU Spring Wire

High quality 140 inch long enough PU spring wire offers more flexibility, lighter and durable.


wider application automotive voltage fuse tester

Upgraded Trailer Brake Tester Light - DC 3-72V Circuit Tester

This Heavy-Duty Digital LED Circuit Tester is designed for precision voltage testing and polarity indication, perfect for trailers, automotive circuits, and electrical diagnostics.

Key Features

Feature Description
Wider Voltage Range Tests DC voltage from 3V to 72V, covering a variety of vehicles and circuits.
Bidirectional Polarity Test Red and green LEDs clearly indicate positive or negative polarity.
Digital LED Display Accurate voltage readout with 0.1V resolution for precise testing results.
Durable Design Sturdy stainless steel probe with anti-lost rubber cover for added durability.
Longer Spring Wire 140-inch PU wire provides more flexibility for hard-to-reach areas.
Buzzing Alarm Single buzz for positive voltage, double buzz for negative, offering clear audio feedback.

Why Choose This Tester?

  • Versatile & Efficient: Ideal for automotive, trailer, and electrical diagnostics.

  • High-Quality Construction: Built to withstand tough conditions and regular use.

  • Easy to Use: Bidirectional clamp and digital LED readout ensure accuracy in any testing scenario.

Package Includes:

  • 1 x Trailer Brake Tester Light

  • 140-inch PU spring wire with alligator clip

  • Anti-lost probe cover

Note: For best results, follow safety guidelines while testing electrical systems.

Why choose us

US Warehouse

We operate multiple U.S. warehouses ensuring most orders ship within 24 hours

Free Shipping

Free Shipping in the US & Easy to Returns

Contact Us

Any questions contact us by Inbox or email at aurawins@outlook.com

Secure Payment

We support a lot of flexible and secure payment plans