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RVMARINEPAT Relay Bypass Switch 9038 Relay Tester Kit Diagnostic Tester Scan Tool & Fuel Pump Relay Bypass Master Kit Replaces 9036 9037 Compatible with Domestic GM BMW Audi Chrysler 6-Pack

Based on 442 reviews
Condition: New
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$13.99
Save $12.00 was $25.99

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Availability: In Stock.
Fulfilled by Amazon

Arrives Thursday, Oct 29
Order within 15 hours and 53 minutes

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At a glance

Condition
New
Connector Type
Plug-In
Contact Material
Aluminum
Contact Type
Normally Closed
Current Rating
20 A
Mounting Type
Panel Mount
Operation Mode
Manual
In the box
switch

Features 5

  • Wide Compatibility & Effortless Control: This Relay tester kit is designed for seamless compatibility with a wide range of vehicles, including Audi, BMW, Volkswagen, GM, Chrysler, and more. Our relay bypass kit also replaces multiple relay models (9038, 9036, 9037) and provides direct control over fuel pumps, window motors, headlights, and other components
  • Save Time & Diagnose Faster: This diagnostic tester is very convenient. Quickly identify electrical issues and save valuable time during repairs. Simply plug the relay tester into the fuel pump relay position to gain direct control over the circuit and pinpoint problems
  • Reliable Performance & Built to Last: Crafted from high-quality materials, this relay tester is rigorously tested to meet or exceed OEM standards. Our relay bypass switch kit enjoy consistent operation with its 20 amp continuous and 30 amp surge current (12V) capacity, ensuring long-lasting performance
  • Complete Kit for Versatile Applications: This 6-pack 9038 includes multiple Relay Testers, giving you ample options for a variety of repair needs and making it a valuable addition to any mechanic's tool box

Specs 18

Connector Type Plug-In
Contact Material Aluminum
Contact Type Normally Closed
Current Rating 20 A
Mounting Type Panel Mount
Operation Mode Manual
Wattage 240 watts
Coil Voltage 12 volts

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Oct 29

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

Learn more about financing & leasing here.

Top Amazon Reviews


Works decent
Nice for testing circuits. Haven't had an issue yet.
Reviewed in the United States on January 21, 2026 by Ricardo Olmos

Good quality, nicely marked.
Nicely marked, good quality relay bypass.
Reviewed in the United States on January 4, 2026 by Paul Gil Paul Gil

Worth the purchase easier than a jumper wire
Worked well as I expected
Reviewed in the United States on November 28, 2025 by Donny O'Shield

Good for troubleshooting problems
Nice kit. Definitely would recommend for home mechanics.
Reviewed in the United States on December 28, 2025 by Dennis F.

Great diagnosing tools
This relay's came in hand to help diagnose a relay board on a Supra 950MT.
Reviewed in the United States on December 14, 2025 by Manu

Works well on American cars
Works well. Does not fit for European relays
Reviewed in the United States on December 3, 2025 by Dana

Good gadget
Looks great
Reviewed in the United States on December 5, 2025 by David R Ogburn Jr

Product works but the toggles suck
The on/off buttons failed super fast but it did the job.
Reviewed in the United States on November 23, 2025 by Chad davis
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