Compatible with 4-pin and 5-pin relays. Just connect it to the relay’s coil using a 12V car battery to quickly check for faults, no need to remove the relay. Saves you time and money.


✨Precise Relay Function Verification
This tester accurately simulates real automotive conditions to verify coil activation and contact switching, making it easy to confirm if a relay is actually faulty before replacing it.

✨Intuitive Diagnostic Results
The built-in LED indicator can clearly display the current status of the relay, such as whether it is working normally, whether the contacts fail or are stuck. No professional knowledge is required, and it is a good helper for the maintenance site and workshop.

✨Widely Compatible
Supports both 12V automotive electrical systems, making it suitable for a wide range of vehicles including cars, trucks, SUVs, RVs, and heavy-duty equipment. One tool covers more applications, ideal for personal or professional use.

✨Built to Last
Made from high-quality materials, it offers reliable performance in daily use or heavy-duty repairs with safety, durability, strong temperature resistance, eco-friendliness, and a lightweight, practical design.
