AUTOOL RT120 – 12V Automotive Relay Tester

Overview

The AUTOOL RT120 is a compact and easy-to-use automotive relay tester designed to quickly check the condition and performance of 12V DC relays. It helps technicians verify whether a relay is functioning properly by automatically testing coil activation, contact switching, and response time.

This is the ideal tool for quickly identifying faulty relays in vehicles — saving time, reducing guesswork, and preventing unnecessary parts replacement.

Key Features

• Designed for testing 12V DC automotive relays

• Tests both 4-pin and 5-pin relays

• Automatically checks relay coil activation and contact switching

• LED indicators clearly show test results (Pass / Fail)

• Plug-and-play operation — simply insert relay and press “Test”

• Compact, lightweight, and built for workshop or mobile use

• Durable construction for daily professional use

Technical Specifications

• Operating Voltage: DC 12 V

• Supported Relay Types: 4-pin and 5-pin

• Indicators: LED pass/fail display

• Power Source: Vehicle battery or DC 12 V supply

• Dimensions: 150 × 85 × 35 mm (approx.)

• Weight: ~250 g

Ideal For

• Automotive workshops and electricians

• Technicians diagnosing starting, lighting, or fan relay issues

• Mobile repair services and automotive enthusiasts

Why Choose the AUTOOL RT120

The RT120 helps detect faulty relays in seconds — saving you from replacing unnecessary parts or chasing false electrical faults. Simple, effective, and reliable, it’s the perfect companion for any diagnostic toolbox.

In the Box

• AUTOOL RT120 Relay Tester

• Power Cable (12 V input)

• User Manual

✅ Product Highlights

✔ Tests 12 V automotive relays
✔ Works with 4-pin & 5-pin designs
✔ LED indicator test results
✔ Compact & portable
✔ Plug-and-play simplicity