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

  • Based on 35 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Friday, Mar 20
Order within 1 hour and 36 minutes
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Features

  • 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
  • Component Included: Our product include relay bypass switch kit 9036-1(36-LRG 20AMP), 9036-2(36-MED 20AMP), 9036-3(36-SML 10AMP), 9037-1(37-LRG 20AMP), 9037-2(37-MED 20AMP), 9037-3(37-SML 10AMP)

Connector Type: Plug-In


Contact Material: Aluminum


Contact Type: Normally Closed


Current Rating: 20 Amps


Mounting Type: Panel Mount


Connector Type: ‎Plug-In


Contact Material: ‎Aluminum


Contact Type: ‎Normally Closed


Current Rating: ‎20 Amps


Mounting Type: ‎Panel Mount


Brand: ‎RVMARINEPAT


Operation Mode: ‎Manual


Wattage: ‎240 watts


Coil Voltage: ‎12 Volts


Contact Current Rating: ‎20 Amps


Maximum Switching Voltage: ‎12 Volts


Minimum Switching Voltage: ‎12 Volts


Specification Met: ‎CE


Product Dimensions: ‎0.39 x 0.39 x 0.39 inches


Item Weight: ‎4.6 ounces


Manufacturer: ‎RVMARINEPAT


Item model number: ‎9038


Date First Available: ‎June 26, 2024


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Mar 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
  • PayTomorrow Financing
  • Financing through Apple 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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