Best 10 Motor Protection Relay Test Kit Options for Reliable Diagnostics in 2026

Choosing the right relay test solution can save time, reduce guesswork, and help you isolate electrical faults with confidence.

Below, we’ve rounded up 10 practical options for different testing needs, from simple relay checks to more complete diagnostic kits.

Best 10 Motor Protection Relay Test Kit Picks for 2026

Relay Jump Starter Kit – Lisle 69300 Master Relay Set

If you need a motor protection relay test kit that can handle a wide range of relay and fused-circuit checks, the Lisle 69300 is built for practical shop use. It includes multiple jumpers, a test lead kit, and terminal leads with switch, fuse, and power options, making it easier to check current or voltage on many vehicle relays without piercing wires.

Best For: Technicians who want a relay test jumper kit with broad vehicle coverage, including some European relay configurations.

Pros:

• Includes 8 relay jumpers for many common relay styles
• Test lead kit helps connect jumpers securely to a multimeter
• Terminal leads add switch, fuse, and power testing options
• Relay puller pliers remove relays without piercing wires

Cons:

• Hand-powered setup is more manual than self-contained testers
• Requires a multimeter for measurement
• Best suited to relay-jumper testing rather than one-button diagnostics

This is a flexible, hands-on choice if you want to test more than just basic 4- and 5-pin relays. Its added jumpers and lead options make it especially useful when you run into vehicles that standard testers may not cover.

Cordless Relay Checker – Performance Tool 3009 12V Relay Tester

The Performance Tool 3009 is a straightforward motor protection relay test kit for quickly checking common 12-volt 4- and 5-pin automotive relays outside the vehicle. Its cordless design and built-in pass/fail LEDs make it a practical pick when you want instant results without clamping to a battery.

Best For: DIYers and techs who want a simple cordless tester for common 12V automotive relays.

Pros:

• Tests relays outside the vehicle for quick diagnosis
• Green pass and red fail LEDs give instant feedback
• No battery clamping required for operation
• Compact all-in-one design runs on included AA batteries

Cons:

• Limited to common 12V 4- and 5-pin relays
• Less versatile than kits with multiple jumpers and leads
• Battery-powered operation adds ongoing battery management

If your workflow centers on common automotive relays, this tester keeps things fast and simple. It is a good fit for basic relay troubleshooting, but it does not try to cover the broader adapter and lead options found in larger kits.

Compact Jumper Kit – Lisle 56810 Relay Test Jumper Kit

The Lisle 56810 is a focused motor protection relay test kit for people who prefer a simple jumper-based approach. It includes four jumpers for popular domestic and import relay sizes, so you can remove the relay, insert the matching jumper, and test without piercing wires or juggling multiple loose leads.

Best For: Users who want a compact, manual relay jumper kit for common vehicle relays.

Pros:

• Four jumpers cover popular relay sizes on domestic and import vehicles
• Simple insert-and-test workflow
• No need to pierce wires or connect multiple jumper wires
• Comes in a blow-molded case for storage

Cons:

• Manual setup is less automated than powered relay testers
• Limited to the relay sizes covered by the four included jumpers
• Requires correct pin alignment on at least the green four-pin jumper

This kit makes sense if you want a compact relay testing accessory rather than a full electronic diagnostic tool. It is best for straightforward bench-style checking where simplicity and storage convenience matter more than automation.

Automatic Relay Tester – Automotive Relay Tester with Relay Puller

This motor protection relay test kit combines a 12V relay tester with a relay puller for fast in-vehicle diagnostics. It automatically detects pin position and checks relay consistency, using green and red LED feedback to show whether the relay is working properly.

Best For: Users who want a fast, battery-based relay tester with an included puller for easy removal.

Pros:

• Automatically detects pin position and test behavior
• Green LED indicates normal operation; red LED indicates a problem
• Includes a relay puller for easier relay removal
• Works with most general-purpose automotive relays on 12V systems

Cons:

• Requires a 12V battery system between 11V and 15V
• Not intended for use with all BMW relays
• Works best with coil resistance above 20 ohms

For users who want a quicker, more guided testing process, this unit offers a nice balance of automation and portability. The built-in puller and simple LED status readout make it a strong option for common relay troubleshooting in the field.

Simple Jumper Kit – Lisle 60610 Relay Test Jumper Kit II

If you need a motor protection relay test kit for quick circuit checks, this Lisle jumper kit focuses on simplicity. It lets you test relays or live circuits without piercing wires or stacking multiple jumper leads, which can save time during troubleshooting.

Best For: Mechanics and techs who want a straightforward relay jumper kit for fast live-circuit testing.

Pros:

• No need to pierce wires or connect multiple jumper wires.
• Tabs on the jumpers help with clamping, and flat pads give you a place to put test leads.
• Makes relay and live-circuit testing quick and easy.
• Comes in a blow-molded case for storage.

Cons:

• Designed as a jumper kit, not an automatic relay analyzer.
• No detailed compatibility list is provided in the notes.

For basic hands-on testing, this kit is a practical choice when you want simple access to relays and live circuits. Its strength is speed and convenience rather than advanced diagnostics.

Auto Relay Tester – Automotive Relay Tester 4 & 5 Pin 12V

For buyers shopping for a motor protection relay test kit, this handheld 12V tester is built to check common 4-pin and 5-pin automotive relays quickly. It uses battery clips, automatic relay detection, and clear red/green indicators to help you see whether a relay is normal or abnormal.

Best For: DIYers and technicians who want a compact, battery-powered relay tester for common 12V automotive relays.

Pros:

• Automatically detects pin position, action time, and consistency during testing.
• Red and green LED indicators give fast pass/fail feedback.
• Works with most general-purpose automotive relays on the market.
• Compact handheld design with battery clips for portable use.

Cons:

• Requires a 12V battery in the 11V-15V range.
• Not intended for use with all BMW relays.
• Best suited to relays with coil resistance above 20 ohms.

This tester is a strong fit if you want a quick diagnostic tool rather than a more manual setup. Its automated relay checks and compact form make it easy to keep in a toolbox or use on the go.

Relay Bypass Switch – 9038A Relay Bypass Switch, 6-Pack

If your motor protection relay test kit needs to do more than simple relay checks, this bypass switch kit is aimed at direct circuit control. It plugs into the fuel pump relay position, letting you control the fuel pump circuit independently of the key on/off system for faster testing.

Best For: Technicians who want a plug-in relay bypass kit for fuel-system and 12V motor testing.

Pros:

• Controls the fuel pump independently of the key on/off system.
• Plug-and-play design installs vertically or horizontally.
• Maximum 20A continuous and 30A surge at 12V.
• Fits many automotive 12V DC motors, including fuel pumps, fans, and window motors.

Cons:

• Primarily a bypass switch, not a dedicated relay analyzer.
• Only two terminals are listed in the details.
• Operating range is limited to 12V automotive circuits.

This kit is useful when the job calls for direct control of a circuit instead of bench-style relay testing. Its plug-in design and broad automotive use cases make it handy for fuel pump and accessory diagnosis.

12V Relay & Charging Checks – Automotive Relay Tester

If you want a simple motor protection relay test kit for 12V vehicle diagnostics, this tester is built to confirm whether 4- and 5-pin relays are firing correctly before you start swapping parts. It also doubles as a battery and alternator checker, so you can verify charging health from the same compact tool.

Best For: Drivers, DIYers, and small shops that need quick relay checks plus basic battery and alternator testing.

Pros:

• Tests 4- and 5-pin relays to help spot bad relays fast.
• Includes battery and alternator checking with heavy-duty clamps.
• Simple push-button operation with light-based results.
• Compact, portable, and vehicle powered for 12V systems.

Cons:

• Limited to vehicles with 12V electrical systems.
• Focused on basic relay and charging checks, not advanced diagnostics.

This is a practical pick if you want a no-fuss tester that can narrow down electrical problems quickly. Its strength is convenience: relay testing and charging checks in one durable, compact unit.

Fuel Pump Bypass Kit – 9038 Relay Tester Set

For anyone shopping for a motor protection relay test kit that can help isolate circuit problems, this 9038 bypass kit gives direct control over relay-driven components. It is designed for use with a range of compatible vehicles and is aimed at faster diagnosis of fuel pump and other relay-controlled systems.

Best For: Mechanics and DIY troubleshooters who need a plug-in bypass kit for fuel pump and relay circuit testing.

Pros:

• Compatible with Audi, BMW, Volkswagen, GM, Chrysler, and more.
• Replaces 9038, 9036, and 9037 relay models.
• Can control fuel pumps, window motors, headlights, and similar circuits.
• Rated for 20A continuous and 30A surge current at 12V.

Cons:

• Designed around specific relay positions and vehicle fitment.
• More of a bypass/diagnostic tool than a full electrical test instrument.

This kit stands out when you need direct relay-circuit control to speed up troubleshooting. The 6-pack format also makes it useful for shops that regularly service compatible platforms.

Multi-Component Relay Control – 9038 Bypass Master Kit

If you need a motor protection relay test kit for diagnosing relay-controlled accessories, this 9038 bypass master kit lets you independently control several 12V DC circuits. It is designed for plug-and-play use in the fuel pump relay position and is suited to testing components like pumps, fans, lights, and window motors.

Best For: Technicians who want a relay bypass kit for quick control of multiple 12V automotive components.

Pros:

• Controls fuel pumps, window motors, headlights, A/C compressors, and cooling fans.
• Replaces 9038, 9036, and 9037.
• Plug-and-play design makes installation straightforward.
• Runs 12V DC motors with switch control for independent circuit testing.

Cons:

• Built for compatible vehicle applications rather than universal use.
• Best suited to relay bypass testing, not broad electrical diagnostics.

This kit is a strong fit when you want one bypass solution for several relay-driven accessories. Its value comes from broad component control and quick setup in compatible vehicles.

How We Picked These Motor Protection Relay Test Kit Options

We focused on kits that are useful for real-world diagnostics, with an emphasis on compatibility, testing convenience, and value. For this roundup, we looked at relay testers that support common automotive-style relays, offer clear connection methods, and suit both shop and home use. We also considered whether a Motor Protection Relay Test Kit is better for quick pass/fail checks or for broader circuit troubleshooting.

Quick Comparison: What Matters Most

Not every relay tester does the same job. Some are compact handheld tools for fast 4- and 5-pin relay checks, while others are jumper or bypass-style kits designed for fault tracing and component activation. If you want a simpler workflow, look for plug-in convenience and straightforward indicators. If you need more flexibility, a kit with bypass leads, clips, or multiple adapters may be the better fit.

Key Buying Factors for a Motor Protection Relay Test Kit

Relay Type and Voltage

Make sure the kit matches the relay format you work with most often. Many options in this category are built for 12V automotive relays, but compatibility with 4-pin, 5-pin, or bypass-style applications can vary.

Testing Method

Some tools check relay function directly, while others help you bypass circuits, trigger components, or verify wiring paths. Choose the method that best fits your diagnostic process.

Portability and Ease of Use

If you move between vehicles or job sites, a compact tester with battery clips or a cordless design may be more practical than a larger bench-style setup.

Build Quality and Safety

Look for solid connectors, clearly marked leads, and durable housings. A reliable Motor Protection Relay Test Kit should help you diagnose issues without adding confusion or poor contact problems.

Who Should Buy Which Motor Protection Relay Test Kit?

DIY drivers: Choose a simple handheld relay tester if you mainly need fast checks on common relays.

Technicians and fleet users: A broader kit with jumper leads or bypass functions is more useful for tracing intermittent faults and testing multiple circuits.

Budget-focused buyers: A compact relay tester can cover the essentials without adding extra accessories you may not use.

Frequent diagnostic users: Pick a more versatile Motor Protection Relay Test Kit with stronger connectors and a wider range of testing options so it can handle repeat use.