Car Relay Tester – Portable Circuit Diagnostics
Car Relay Tester – Portable Circuit Diagnostics
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- 30-day return window - simple returns
- Free shipping and a tracking number on every order
- Secure, encrypted payment
The problem
A relay tester that answers you right there in the engine bay
Odd noises from the AC, an ignition that will not respond, a window that has stopped moving – a faulty relay is often the cause, and a relay tester gives you the answer in seconds. Connect the crocodile clips to the car battery, insert the suspect relay and press the TEST button. Green LED lights up: the relay is fine. Red LED lights up: replace the relay.
How it works
Three steps – from suspicion to answer
Specifications
Technical data
| Compatible relays | 4-pin and 5-pin universal relays |
|---|---|
| Operating voltage | 11–15 V (12 V car battery) |
| Indication | Green LED = fine, Red LED = faulty |
| Automatic pin detection | Yes – identifies pin position and release time |
| Suits | Most passenger cars with a 12 V battery |
Choose your model
Standard or Upgraded?
- Standard – full functionality for 4- and 5-pin relays with LED indication. Suits most car enthusiasts and home workshops.
- Upgraded – includes a transparent cover that lets you watch the relay's internal movement during testing. Good for anyone who wants to understand more about how a relay works.
Common questions
What you might be wondering
Which relays can I test with this unit?
The unit tests most universal relays with 4 or 5 pins – the ones used for the AC, starter motor, fuel pump, windows and similar functions. You set 4PIN or 5PIN with the switch before testing.
Do I have to remove the relay from the car to test it?
Yes, you take the relay out of its holder and insert it into the tester's socket. The crocodile clips connect directly to the car battery (11–15 V).
What happens if I connect to the wrong terminal?
The clips are colour-coded and insulated for safety. Red clamp on the positive terminal and black on the negative. The red LED indicator confirms a correct connection before you can start the test.
What is the difference between the Standard and Upgraded models?
The Standard model gives full test functionality with an LED readout. The Upgraded model has a transparent plastic cover over the socket so you can visually follow the relay's mechanical movement during testing.
Does it work on older cars and European vehicles?
Yes, the unit is compatible with all vehicles that use a standard 12 V battery (11–15 V) and universal relays with 4 or 5 pins. That covers most European passenger cars from the 1990s onwards.
Delivery & returns
Delivery & returns
Free shipping on every order, with no minimum order value. Orders placed before 23:00 (CET) are processed within 0-2 business days. Total delivery time is normally 6-9 business days, and you receive a tracking number by email once your parcel has shipped.
You have 30 days from the delivery date to return an item. Contact us at hello@eklundstools.com before returning anything and we will send you the return address and instructions. Return postage is paid by you unless the item is faulty, damaged or incorrect. See our refund policy for the full terms.
