1 9

Buy 2 Get 1 Free | SALE ENDS TONIGHT

Automotive Relay Tester Tool ~ Find faulty relays in seconds.

Automotive Relay Tester Tool ~ Find faulty relays in seconds.

$17.99 USD
$49.00 USD $49.00 $17.99 USD
Sale Sold out
Shipping calculated at checkout.

✔️ Slides under the mattress and lifts it for you

✔️ Lightweight but strong enough for thick mattresses

✔️ No back pain, no finger pinching, no wrestling with corners

• 100% Money-back guarantee

DESCRIPTION

The Automotive Relay Tester Tool takes the guesswork out of diagnosing electrical issues, giving you a fast and reliable way to check the health of 4-pin and 5-pin relays.

With automatic pin detection, clear LED indicators, and simple clip-and-test operation, it helps you spot faulty relays before they become bigger (and more expensive) problems.

This compact, lightweight tool is designed for drivers, DIYers, and mechanics who want quick, accurate testing without bulky equipment or complicated steps.

Its green/red LED display shows relay condition instantly, making it easy to confirm whether your relay is functioning normally or needs replacing.

Keep this tester in your glovebox or toolbox for on-the-go diagnostics, and enjoy the peace of mind of knowing your vehicle’s electrical system is under control.

HOW TO USE IT

  1. Clip the black alligator clip to the car battery’s negative pole and the red clip to the positive pole.
  2. When the indicator lights up, the tester is ready.
  3. Choose the correct socket for your relay (4-pin or 5-pin), insert the relay firmly, and press the TEST button.
  4. Watch the LED lights:
    Green = relay is functioning normally
    Red = relay is faulty and needs attention
  5. Repeat as needed to check multiple relays quickly and safely.

WHAT'S INCLUDED

  • 1× Automotive Relay Tester Tool
  • Rubber-sleeved battery clips (attached)
View full details

OFFER ENDS IN 24 HOURS

Find Relay Problems Before They Find You

A bad relay can shut your entire car down, but this pocket-sized tester exposes issues in seconds. Clip it to your battery, press one button, and the LED indicators tell you instantly if a relay is solid or failing. No guesswork, no confusion, just a clear green or red light you can trust.

Smart Vehicle Diagnostics

  • Find Hidden Electrical Issues in Seconds

    This compact tester pinpoints relay problems with a quick clip-and-press. It evaluates pin layout, switching performance, and contact response, then shows a clear green or red indicator so you immediately know what’s working and what’s failing.

  • Precision Testing Made Simple

    Designed for both 4-pin and 5-pin relays, it connects directly to your car battery and delivers fast, reliable results. Its small size, safe rubber-sleeved clamps, and straightforward operation make it perfect for glovebox storage and on-the-go troubleshooting.

Test It for 90 Days

If this relay tester doesn’t become your go-to tool for quick diagnostics within 90 days, simply send it back for a full refund. No hassle, no stress.

  • ★★★★★

    "I used this on my old SUV after the headlights started flickering and it honestly saved me a trip to the shop. The green and red lights make it super easy to understand. Took me like two minutes to figure out which relay was bad."

    Mike T.

  • ★★★★★

    "Didn’t expect to like this as much as I do, but it’s actually really handy."

    Lauren T.

  • ★★★★★

    "Tried it on a relay that I suspected was acting up when the radio randomly cut off. The tester lit red instantly. Swapped the relay and the problem hasn’t come back since. Pretty satisfying."

    Paul R.

1 3

Got Questions? We Got Answers

Does this work with all types of mattresses?

It works best with standard mattresses placed on a box spring. The wedge needs the box spring surface to slide in and lift properly. It may not function as intended on platform beds or mattresses without a box spring.

Will it damage my mattress or bedding?

No. The tool is smooth, lightweight, and designed to slide in without scratching or tearing fabric. It lifts the mattress just enough to tuck sheets comfortably.

Can one person use it easily?

Yes. It’s made specifically for solo use. You slide it under the corner you’re working on, and it holds the mattress up while you use both hands to tuck and smooth your bedding.

Is one tool enough or should I get two?

One tool works for everyday sheet changes, but two can speed things up. Many users prefer using one on each side when adding a bed skirt or adjusting multiple corners at once.

What are the shipping details?

United States: 5-18 business days

United Kingdom: 7-18 business days

Australia: 7-18 business days

Canada: 7-18 business days

Europe: 7-18 business days

Asia: 7-18 business days

Track your order by using our Track Order Feature or by contacting a member of our support team by using our contact form or emailing us at support@cedarandash.com.