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A black relay detection tester with 4 and 5 pin indicators shown inside a car engine bay.
A set of black and red relay testers for 4-pin and 5-pin relays, demonstrating power safety, ease of operation, universal com
A gray electronic device is shown with options for 4-pin or 5-pin relay testing, featuring test buttons and power switch.
Detail instruction diagram showing components of a 12V relay tester including LED lighting, relay connector, test button, and
A red and black electronic device used to test 4-pin and 5-pin relays with a built-in test function.
A hand holds a red LED light tester device, showing test indicators for 4-pin and 5-pin relays in a car engine bay context.
A hand holds a red relay tester device with 4-pin and 5-pin sockets, demonstrating how to insert a relay into the sockets.
A hand holds a red and black relay tester device, demonstrating how to test the pin position of an unknown relay.
A black relay tester device is shown next to a blue car, demonstrating its ability to test 4-pin or 5-pin relays.
A hand holds a red relay tester device with 4-pin and 5-pin sockets, demonstrating how to insert a relay into the sockets.
A black 12V relay tester device with a red accent, showing test points and an off/on switch, next to a USB cable.
A black car relay tester device with test points and power switch, shown next to a red cable.
A red and black 12V relay tester device with a digital display, cables, and a test button.
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12V Relay Tester for 4-Pin & 5-Pin Relays with TYPE-C Power

Regular price $31.99 Sale price $26.99 – $51.99

Why customers love it

Diagnose relay faults in seconds, anywhere

This compact 12V relay tester checks coil and contact function for 4-pin and 5-pin relays in about one second, with clear LED and audio feedback. Powered via USB to Type-C, it's built for mechanics and DIY enthusiasts alike.

  • Tests both coil ON/OFF and contact status for 4-pin and 5-pin relays
  • Fast detection: results in just 1 second, with a clear green light and beep for normal, red light for fault
  • Dual-color LED indicator and audible alert for instant, easy result reading
  • TYPE-C power input, works with power banks, wall adapters, or car chargers (USB to TYPE-C cable included)
  • Built-in LED lighting for use in dark or hard-to-see areas
  • Compact, portable design with simple one-button test operation
A black relay detection tester with 4 and 5 pin indicators shown inside a car engine bay.

Specs

The details that matter

Built to last outdoors, season after season.

Product Type
Relay Tester
Compatibility
4-Pin & 5-Pin Relays
Voltage
12V
Power Input
TYPE-C
Operating Temperature
-10°C to 50°C

Our worry-free shopping promise

If your order arrives damaged, defective, or not as described, contact us within 14 days and we will make it right with a replacement or refund.

Shipping & returns

Shipping

  • Delivers to United States (based on your selected country/region).
  • Estimated delivery: 3–15 business days after dispatch.
  • Shipping cost: Free.

Returns

You can request a return within 14 days after delivery. Standard returns have a €4.00 EUR (approximately $4.66 USD) flat-rate return shipping fee, deducted from your refund. Return shipping is free for items that arrived damaged, defective, or incorrect. Items should be unused and in original packaging where possible. Contact us before sending anything back.

Shipping policyReturn & refund policy

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