Instant Trailer Circuit Diagnoser

$34.99 USD $24.95 USD SAVE 29%

Qty: 1-Pack (Essential Tool)

1-Pack (Essential Tool)
2-Pack (Keep a Backup - 10%)
3-Pack (Workshop Pack - 15%)

Description
Designed for 12V Systems

Instantly Diagnose Trailer Wiring Faults

A plug-and-play solution for quickly checking circuits on RVs, trucks, and trailers with 7-pin European standard connectors. No more guesswork.

Synchronized Dual-Side Testing with Clear LED Indicators

This tester connects directly between your towing vehicle and trailer, simultaneously checking the light circuits on both sides. The intuitive LED panel provides immediate, synchronized feedback for each of the 7 pins, clearly indicating any faults according to the ISO 1724 standard.

ISO 1724 Compliant 6 LED Indicators Vehicle & Trailer Check

Simple Plug-and-Play Operation

Forget complex setups, wire cutting, or splicing. Simply plug the tester into the sockets, press the side button to test the trailer side, and observe the lights. Its straightforward design makes it easy for anyone to perform a pre-trip safety check in seconds.

No Tools Needed Quick Setup User-Friendly

Built Tough for Wide Compatibility

Engineered for broad application, this unit works with most 12V commercial vehicles, RVs, caravans, and trailers equipped with standard 7-pin round connectors. The housing is made from durable ABS plastic, and the contacts are premium copper for high conductivity and longevity.

Durable ABS Housing Copper Contacts Ergonomic Grip

Technical Specifications

Connector Type 7-Pin European Standard (Round)
Voltage 12V DC
Standard ISO 1724
Housing Material ABS Plastic
Contact Material Copper
Display 6-LED Indicator Panel
Power Source Vehicle Battery (Car Side) / 9V Battery (Trailer Side - Not Included)

Frequently Asked Questions

Will this work with flat 4-pin or 5-pin connectors?
No, this tester is specifically designed for European standard 7-pin round connectors only. It is not compatible with flat blade-style connectors.
Do I need a battery to use this tester?
Yes, a standard 9V battery (not included) is required to power the tester when checking the trailer-side circuits. The vehicle-side test is powered by the vehicle's battery once connected.
How do I know what each light means?
The display panel on the tester is clearly labeled with symbols, wire colors, and functions (e.g., left indicator, brake light) according to the ISO 1724 standard, making it easy to identify which circuit is being tested.