FASTSTORM Fuel Pump Relay Kit 12V 60A Waterproof Heavy-Duty Wiring Harness

FASTSTORM's 12V electric fuel pump relay kit is a waterproof, heavy-duty relay and wiring harness designed to deliver stable battery power to 12V fuel pumps and similar accessories.

This relay bypass harness supplies a direct, protected feed from the battery to your fuel pump so the pump gets consistent voltage without strain on factory wiring. The kit pairs a high-capacity relay with thick gauge leads, a waterproof fuse holder, and a clear wiring layout to simplify installation and reduce voltage drop. It’s built for vehicles, trucks, marine rigs, and off-road equipment that need a reliable 12V relay solution for fuel pumps, cooling fans, compressors, or other 12V devices.

How does this relay kit prevent voltage drop and protect the pump?

The kit routes power straight from the battery through a 60A relay and appropriately sized wires so the pump receives steady voltage under load. A 30A inline fuse in a waterproof holder protects the circuit from overcurrent, while the heavy-gauge battery lead minimizes resistance that causes voltage sag.

• 10 AWG red battery lead for low-resistance power delivery
• 6 AWG-equivalent capacity blue output run sized for pump current
• 60A-rated relay to handle surges and protect factory circuits
• Waterproof fuse holder with 30A fuse for circuit protection

What does the kit include and how easy is installation?

FASTSTORM supplies a complete set of components so you can wire the relay without sourcing extra parts. Color-coded wires and a straightforward wiring diagram shorten install time; basic hand tools and a few mounting screws are all you need to finish most installs.

• 60A sealed relay and matching wire harness with connectors
• 10-foot 10-gauge red battery wire and 6-foot 12-gauge blue pump wire
• Yellow ignition trigger wires and gray ground leads clearly labeled
• Waterproof fuse holder, 30A fuse, and mounting hardware included

Will this relay work with my vehicle or pump?

The harness is designed for universal fit on 12V systems that require a relay-triggered power feed and do not exceed the kit’s continuous current limits. It’s compatible with most electric fuel pumps, aftermarket high-pressure pumps, cooling fans and other 12V accessories that use an ignition-triggered relay feed.

• Fits standard 12V automotive systems and aftermarket pumps
• Suitable for devices that require ignition-triggered power
• Not intended for continuous currents above the fuse and relay ratings
• Works in wet or exposed locations thanks to the sealed components

How durable is the kit for harsh environments?

Components are selected for long-term reliability in automotive and outdoor conditions. The relay enclosure and fuse holder are waterproof, wiring uses weather-resistant insulation, and connectors are rugged to withstand vibration and temperature changes.

• Sealed relay housing to keep moisture and dirt out
• Waterproof fuse holder protects the fuse from elements
• Thick insulation and sturdy connectors resist abrasion
• Mounting hardware secures the relay away from heat and movement

Who this is for: Installers, mechanics, and vehicle owners who replace or upgrade fuel pump wiring to ensure reliable operation will benefit most from this kit. It’s ideal for anyone tuning, repairing, or upgrading their fuel delivery system, or for powering other 12V accessories where a robust, protected battery feed is needed. If you need a compact, weatherproof relay solution with clear wiring and heavy-gauge leads, this FASTSTORM relay harness kit provides the pieces required for a professional-quality connection.