AUTOOL RT120 12V Automotive Relay Tester
The AUTOOL RT120 Relay Tester is a practical automotive diagnostic tool designed to quickly check the operating condition of compatible 12V 4-pin and 5-pin relays. It helps mechanics identify faulty relays before replacing electrical components or performing more complicated circuit repairs.
The tester connects directly to a 12V vehicle battery and performs an operational test using the appropriate relay socket. Clear indicators make the test result easy to understand, helping save diagnostic time in professional workshops and automotive electrical service.
Main Features
- Tests compatible 12V automotive relays
- Supports commonly used 4-pin and 5-pin relays
- Helps identify working and defective relays
- Simple one-button testing operation
- Clear visual test indicators
- Intelligent warning indication
- Multiple relay socket configurations
- Connects directly to a 12V vehicle battery
- Compact and portable workshop design
- Suitable for professional and DIY automotive maintenance
Fast Relay Testing
The RT120 provides a convenient way to check a relay outside the vehicle circuit. This helps determine whether an electrical problem is caused by a defective relay or another part of the vehicle wiring system.
Support for 4-Pin and 5-Pin Relays
The tester includes multiple socket positions for testing commonly used automotive 4-pin and 5-pin relay configurations. Always confirm that the relay terminal layout matches one of the tester’s supported sockets before starting the test.
Clear Test Indication
The tester activates the connected relay and checks its operation. Its visual indicators allow the technician to quickly determine whether the relay passes the test or requires further inspection or replacement.
Easy to Use
- Turn off the vehicle ignition.
- Connect the red battery clip to the positive terminal.
- Connect the black battery clip to the negative terminal.
- Insert the compatible relay into the correct test socket.
- Confirm that the relay terminal arrangement is correct.
- Press the test button and observe the indicators.
- Replace or inspect the relay if it fails the test.
Typical Applications
The AUTOOL RT120 can help test compatible relays used in systems such as:
- Headlights and auxiliary lights
- Cooling fans
- Fuel pumps
- Horn circuits
- Starter control circuits
- Air-conditioning systems
- Windshield wipers
- Power-window circuits
- Other compatible 12V automotive systems
Suitable for Workshops and Mobile Technicians
Its compact construction makes the RT120 useful for automotive electricians, mechanics, mobile technicians, repair shops and vehicle owners who need a quick method of checking common automotive relays.
Important Notes
- Designed for compatible 12V automotive relays only.
- It is not intended for 24V relays or household electrical systems.
- Supports selected 4-pin and 5-pin relay configurations; it does not support every relay design.
- Check the relay diagram and terminal arrangement before insertion.
- Do not force an incompatible relay into a test socket.
- Disconnect the tester after completing the test.
- This is a relay tester, not an OBD2 scanner, circuit tester or battery analyzer.
- Package contents may vary according to the selected seller option.
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