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OEMTOOLS 27211 Relay Circuit Tester Automotive Relay Tester, Relay Bypass Switch Kit 24V/12V Relay Tester Automotive Kit For Vehicle Electrical System Maintenance

Based on 30 reviews
Condition: New
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$205.63

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Availability: In Stock.
Fulfilled by Mobile Distributor Supply

Arrives Friday, Nov 20
Order within 18 hours and 24 minutes

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At a glance

Condition
New
Dimensions
13.5 x 10.2 x 3.4 in
Color
Multi
Power Source
Battery Powered
Style
Industrial
Measurement Type
Multimeter
Specification Met
Oemtools
In the box
Relay Circuit Tester
Warranty
OEMTOOLS Limited Lifetime
Works with
Automotive electrical systems, vehicle ignition systems

Features 5

  • Near-Universal Relay Tester Kit: This automotive circuit tester comes with 6 popular auto relays and one universal relay tester lead, making it useful for a broad range of makes and models
  • Easy Operation: Simply choose the applicable dummy testing relay, plug it into the fused relay block, connect car relay tester to vehicle's battery, and power on for circuit health reading
  • Total Electrical Troubleshooting: Tool can test an entire circuit from the battery to the component; Bypass relays for pressure testing, distributor or cam shaft adjustments, A/C filling and more
  • Efficient and Effective: These electronic test equipment kits allow you to identify at the push of a button if a wire, a part, or a relay is defective; Cut relay related diagnosis time by 75%

Description

This handy car relay diagnostic tool will identify at the push of a button if a wire, a part, or a relay is defective, without the use of a multimeter. The OEMTOOLS 27211 Relay Circuit Tester tests an entire circuit from the battery to the component in question. With the circuit testers included in this relay kit, you can not only find out if electrical issues are due to improper relay functioning but also determine if the relay itself is functioning properly. If the technician needs more information about the problem, the circuit testing tool features easily accessible ports for use with other specialty tools. The auto circuit tester also has other practical uses. Since it can jump the relay, the technician can use the vehicle circuit tester as a remote control starter in engine work like compression testing, distributor or cam shaft adjusting, or run the compressor during an A/C charge. This comprehensive relay tester tool set comes complete with sturdy custom carrying case for easy storage and portability. Reach for the OEMTOOLS 27211 Relay Circuit Tester today and start working smarter, not harder.

Specs 21

Brand OEMTOOLS
Power Source Battery Powered
Style Industrial
Color Multi
Item dimensions L x W x H 13.5 x 10.2 x 3.4 inches
Minimum Operating Voltage 12 volts
Measurement Type Multimeter
Maximum Operating Voltage 24 volts

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Nov 20

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


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Greta tester
Reviewed in the United States on July 31, 2026 by Mario

You will master that fuse box.
Complete set. Sturdy and easy. No circuit will deceive you.
Reviewed in the United States on May 28, 2026 by orlando

Great tool
Works good i love it
Reviewed in the United States on May 17, 2026 by Ashley

As described
Worked great.
Reviewed in the United States on February 12, 2026 by Ronald Kelly

Great addition to the garage
One of those tools you don’t think you need till you do.
Reviewed in the United States on December 28, 2025 by David R Ogburn Jr

A Diagnostic Must-Have!
As a mobile mechanic, component testing is a regular occurrence. This handy tool allows me to not only quickly confirm if the component has power but also manually activate the suspected faulty component. Word of warning: If you're a DIY'er and are using the universal relay tester lead, make sure you understand how the relay is wired, or you may fry something. ... show more
Reviewed in the United States on January 31, 2024 by Robert

Product is no what is pictured. Same as the ...
Product is no what is pictured. Same as the calvan and others. It is the red version with the large adapters. I wanted the version with the smaller adapters so it can fit into smaller areas.
Reviewed in the United States on March 18, 2015 by jeremy

Works but has issues in tight spaces.
Some of the adapters are huge and won't always fit in desired locations.
Reviewed in the United States on June 25, 2025 by Lee P.
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