Price: £11.99
(as of Sep 27, 2025 17:26:49 UTC – Details)
Product Description
Operating instructions:
1. Connect the black alligator clip to the negative pole of the 12V car battery and the red alligator clip to the positive pole
2. Relay Tester is ready when RED LED lights up
3. Select the pin (settable to 4pin and 5pin) according to the pins of relay before plugging it into the tester
4. Plug the replay into one of the three receptacles
5. Press the “Test” button
6. It will automatically detect the pin configuration of the relay. Red LED lights if the relay is destroyed or testing time is too long, GREEN LED lights if the relay is normal
12V Automotive Relay Tester, Car Battery Diagnostic Checker Tools, Battery Buddy
Packaging includes:
1 x 12V Automotive Relay Tester
ATTENTION:
· The car battery must be 12V, and the voltage of the battery is 11V-15V
· For coil resistance above 20 ohms
Product Description: Quick off-the-car relay tester – checks relay coil and switch contacts. Automatic test with good/bad indication – fails bad relays. Settable to 4 and 5 pin relay – tests the 3 most popular automotive relays Easy to operate, high efficiency, 4 feet 5 feet can be tested. Uses vehicle’s 12 Volt battery for power.
Measurements
Relay Tester Automotive Kit
12V Car Relay Circuit Tester
Quick off-the-car relay tester – checks relay coil and switch contacts.Automatic test with good/bad indication – fails bad relays.Settable to 4 and 5 pin relay – tests the 3 most popular automotive relaysEasy to operate, high efficiency, 4 feet 5 feet can be tested.The car battery must be 12 volts. The voltage of the battery must be between 11V and 15V. Applicable coil resistance must be above 20 ohm. Packaging includes: 1 x 12V Automotive Relay Tester
Universal 12V Relay & Fuse Tester: Quickly diagnose automotive relays and fuses with this compact 12V tester, compatible with most vehicles, including cars, vans, RVs, and boats.
Automatic Diagnostic Function: Features an automatic test mode that provides clear “good” or “bad” indications, simplifying the troubleshooting process for both professionals and DIY enthusiasts.
Supports 4 & 5 Pin Relays: Designed to test the three most common automotive relays (4-pin and 5-pin), ensuring broad compatibility across various vehicle systems.
Efficient and User-Friendly: Operates efficiently within a 12V battery range of 11V to 15V, with an easy-to-use interface that requires no additional power source.
Versatile Application: Ideal for use in modern cars, classic vehicles, camper vans, caravans, and marine applications, making it a must-have tool for comprehensive vehicle diagnostics.
Customers say
Customers find the relay tester to be worth the money, with one noting it’s perfect for home mechanics. However, the functionality receives mixed feedback, with some saying it works well while others report issues. Additionally, the build quality gets mixed reviews, with one customer describing it as having a cheap feel.