Ronybuy Dual Electric Fan Relay Kit 40 AMP

Ronybuy Dual Electric Fan Relay Kit Instruction Manual

Model: Dual Electric Fan Relay Kit 40 AMP

1. Introduction

This manual provides detailed instructions for the installation and operation of the Ronybuy Dual Electric Fan Relay Kit. This kit is designed to control dual electric cooling fans for automotive radiator systems, ensuring optimal engine temperature regulation.

The kit features a 40 AMP 12V relay system with a thermostat switch that activates fans at 185°F and deactivates them at 175°F. It is suitable for a wide range of cooling fans and engine types.

Figure 1.1: Overview of the Ronybuy Dual Electric Fan Relay Kit components, including two 40A relays with harnesses, a thermostat switch, fuses, and various connectors.

2. Compatibility

This dual electric radiator fan relay kit is compatible with 10, 12, 14, and 16-inch cooling fans. It is designed to work with a broad range of engine types, including but not limited to:

265, 283, 305, 307, 327, 350, 383, 400, 396, 402, 427, 454, 472, 502
260, 289, 302, 351W, 347, 352, 360, 390, 406, 427, 428, 429, 460, 351C, 351M, 400M
273, 318, 340, 360, 361, 383, 400, 413, 426W, 440, 455, 330, 326

Compatibility chart for cooling fan sizes and engine types

Figure 2.1: Visual representation of compatible cooling fan sizes and a list of supported engine displacements.

3. Package Contents

The Ronybuy Dual Electric Fan Relay Kit includes all necessary components for installation:

2x 40A Relays with Harnesses
1x 3/8" Thermostat Switch
1x 3/8" to 1/2" Adapter
2x Inline Fuse Holders
2x 20 Amp Fuses
4x Wire Connectors
8x Ring Terminals
1x Wiring Diagram

Contents of the Ronybuy Dual Electric Fan Relay Kit

Figure 3.1: A visual breakdown of all items included in the product package, such as relays, wiring, fuses, and the thermostat switch.

4. Setup and Installation

Follow these steps carefully to install your dual electric fan relay kit. Ensure the vehicle's battery is disconnected before beginning any electrical work.

4.1 Wiring Instructions

Connect the RED wire to the 12VDC Positive Battery Terminal.
Connect the COFFEE wire to the Fan Positive terminal.
Connect the BLACK wire to the Ignition source.
Connect the GREY wire to the Sending Unit.
Ensure the thermostat switch is properly grounded through its threads to the engine. The engine itself must also be grounded for the system to function correctly.
If installing high-profile fans, it is recommended to crimp or solder larger gauge wires to accommodate higher amperage draw, as the included 14AWG wires (rated for 15 amps) may not be sufficient.

Wiring diagram for the dual electric fan relay kit

Figure 4.1: Detailed wiring diagram illustrating connections for the dual electric fan relay kit, including battery, ignition, fan, and sending unit connections.

4.2 Thermostat Switch Installation

The thermostat switch has a 3/8" NPT pipe thread. A 1/2" adapter is included for compatibility with different ports. Install the thermostat switch into a suitable port on your engine or radiator system where it can accurately measure coolant temperature.

5. Operating Instructions

Once properly installed, the Ronybuy Dual Electric Fan Relay Kit operates automatically based on engine temperature:

The electric cooling fans will turn ON when the engine coolant temperature reaches 185°F (85°C).
The electric cooling fans will turn OFF when the engine coolant temperature drops to 175°F (79°C).

The relays are designed to be waterproof, allowing them to function reliably in various environmental conditions.

6. Maintenance

The Ronybuy Dual Electric Fan Relay Kit is designed for durability and minimal maintenance. However, periodic checks are recommended to ensure continued optimal performance:

Wiring Inspection: Periodically inspect all wiring connections for signs of wear, corrosion, or looseness. Ensure all terminals are securely fastened.
Fuse Check: If the fans are not operating, check the 20 Amp fuses in the inline fuse holders. Replace with fuses of the same rating if blown.
Grounding: Verify that the thermostat switch and engine grounds remain secure and free of corrosion. A poor ground connection can prevent proper operation.
Relay Condition: While the relays are waterproof, ensure they are mounted in a location that minimizes direct exposure to extreme elements or physical damage.

7. Troubleshooting

Problem	Possible Cause	Solution
Fans do not turn on.	Thermostat switch not grounded. Engine not grounded. Blown fuse. Loose wiring connection. Incorrect wiring.	Ensure thermostat threads are making good contact with a grounded engine component. Verify engine has a solid ground connection to the chassis/battery. Check and replace 20 Amp fuses if necessary. Inspect all wire connections for tightness and proper contact. Review the wiring diagram (Figure 4.1) and re-check all connections.
Fans turn on but do not cool effectively (for high-profile fans).	Insufficient wire gauge for high amperage draw.	If using high-profile fans, ensure the wiring is of sufficient gauge (e.g., 12AWG for 20 Amps, 10AWG for 30 Amps, 8AWG for 40 Amps) to handle the current draw. The included 14AWG wires are rated for 15 amps.
Fans run continuously or do not turn off.	Faulty thermostat switch. Thermostat switch not properly installed or sensing temperature correctly.	Test the thermostat switch for proper operation. Ensure the thermostat switch is fully threaded and making good contact with the coolant.

8. Specifications

Feature	Detail
Product Dimensions	5.9 x 5.9 x 1.77 inches
Item Weight	13.12 ounces
Model Number	Dual Electric Fan Relay Kit 40 AMP
Manufacturer	Ronybuy
Connector Type	Quick Connect
Contact Material	Plastic
Contact Type	Normally Open
Current Rating	40 Amps
Mounting Type	Snap In Mount
Thermostat ON Temperature	185°F (85°C)
Thermostat OFF Temperature	175°F (79°C)
Thermostat Thread Size	3/8" NPT (with 1/2" adapter)
Relay Type	4-PIN Waterproof Relay
Wire Gauge (included)	14AWG (rated for 15 amps)

Close-up of relay, fuse holder, tinned copper wires, and thermostat switch

Figure 8.1: Components highlighting solid and safety construction, including the waterproof relay, fuse, tinned copper wires, and thermostat switch.

Detailed view of 40 AMP 12V electric fan relay kit components and pinouts

Figure 8.2: Detailed view of the 40 AMP 12V electric fan relay kit components, including the relay, its base, and pinout diagrams.

9. Warranty and Support

Information regarding product warranty and customer support for the Ronybuy Dual Electric Fan Relay Kit is not provided within this manual. Please refer to the product packaging or the manufacturer's official website for details on warranty coverage and how to contact customer support.