FASTSTORM Dual Electric Fan Relay Kit — 60A Waterproof 4-Pin Harness with 200°F Temp Sensor, Complete Wiring & Fuse Kit

FASTSTORM Dual Electric Fan Relay Kit is a complete 60A wiring and sensor package that automates one- or two-fan radiator cooling, switching fans on around 200°F and off at 185°F.

This all-in-one electric radiator fan kit bundles a heavy-duty 60A relay, a waterproof 4-pin harness, an OE-style temperature switch, adapters, fuses, and mounting/termination hardware so you can replace or upgrade cooling fans without hunting down parts. The included wiring diagram and labeled leads make installation straightforward for do-it-yourself mechanics and professional installers alike.

How does this kit manage engine temperature during operation?

The kit uses the supplied temperature sensor to monitor coolant temperature and energize the relay when the engine reaches approximately 200°F, then de-energizes at about 185°F. That thermostat-like control provides on-demand cooling only when needed to reduce electrical draw and fan wear.

• Temperature switch activates at ~200°F and deactivates at ~185°F
• 3/8" threaded sensor with supplied 1/2" adapter for flexible mounting
• OE-style sensor grounds through threads for reliable readings
• Suitable for head or water-jacket installation where grounding is available

What components are included and how do they simplify installation?

The FASTSTORM kit includes everything required to wire one or two electric fans: a 60A waterproof relay, 4-pin harness, sensor, adapters, inline fuse holders with fuses, ring terminals, spade connector, and a clear wiring diagram. Color-coded leads and labeled terminals reduce guesswork and cut installation time.

• 60A relay and waterproof 4-pin harness for heavy loads
• 2 inline fuse holders plus four 20A fuses for circuit protection
• 8 ring terminals and 4 wire connectors for secure battery and fan connections
• Wiring diagram showing RED = battery positive, BLUE = fan positive, GREY = sensor, YELLOW = ignition

Which fans and vehicles are compatible with this relay kit?

The wiring and relay are designed to support common electric cooling fan sizes and configurations, including single or dual setups. It’s broadly compatible with cars, trucks, off-road vehicles, and marine applications where a 12V fan control is required.

• Works with 10", 12", 14", and 16" electric cooling fans
• Configurable for single or dual-fan systems and universal mounts
• Appropriate for automotive, light truck, and boat cooling installations
• Ideal when pairing with aftermarket radiator fan kits or replacing relay components

How durable and reliable is the relay and harness in real-world use?

The relay is rated for 60 amps and the harness uses a waterproof 4-pin relay connection, helping protect electrical contacts from moisture and road debris. All terminals and connectors included are intended to create secure, long-lasting connections when properly crimped and installed.

• 60A relay capacity supports high-current fan motors without overheating
• Waterproof relay interface reduces corrosion risk in wet environments
• Inline fuses protect wiring from overloads and short circuits
• OE-style sensor design ensures consistent grounding and signal integrity

Who is this for: FASTSTORM’s Dual Electric Fan Relay Kit is aimed at DIY mechanics, automotive technicians, and performance enthusiasts who need a reliable, plug-and-play solution to control one or two electric radiator fans. It’s suited to anyone replacing a failing relay/sensor assembly, upgrading to electric fans from mechanical setups, or adding temperature-controlled cooling to a custom or modified vehicle. If you need a compact, complete wiring kit with an OE-style temperature switch and robust 60A relay, this kit provides the connectors, diagram, and hardware to get the job done efficiently.