Introduction
Thank you for choosing the fouwick Submersible LED Trailer Light Kit. This manual provides essential information for the proper installation, operation, and maintenance of your new trailer lights. Please read these instructions carefully before use to ensure safe and efficient performance.
This kit is designed for 12V DC vehicles with a maximum width of 80 inches, suitable for most boat trailers, utility trailers, trucks, RVs, marine applications, pickups, campers, tractors, buses, lorries, vans, caravans, and snowmobiles.
Product Features
- Full Functions: Left and Right trailer tail lights provide 7 functions: stop, turn, tail, rear reflector, side reflector, side marker light, and license plate light.
- Enhanced Brightness & Safety: Utilizes quality LEDs for optimal brightness with lower amperage draw, offering improved visibility and longer lifespan compared to incandescent lamps. 100% DOT compliant for safety.
- IP67 Waterproof Rating: Trailer lights feature a glue filling process to achieve IP67 waterproof level. Designed with drainage ports to prevent seawater corrosion, ensuring durability in various weather conditions and submersion.
- Durable Construction: Made from durable polycarbonate lens and ABS housing, ensuring reliable operation in extreme environments such as rain, snow, deserts, and saltwater.
What's Included
The fouwick Submersible LED Trailer Light Kit includes all necessary components for installation:
- 2 x Square LED Tail Lights
- 2 x Amber Clearance Lights
- 1 x License Plate Bracket
- 1 x 22ft + 4ft Trailer Wiring Harness
- Various Stainless Steel Mounting Hardware (Nuts, connectors)

Setup and Installation
Follow these steps for proper installation of your trailer light kit. Ensure the vehicle's power is off before beginning installation.
- Mounting Lights: Securely attach the square LED tail lights to the rear of your trailer using the provided mounting hardware. Ensure they are positioned correctly for visibility.
- Mounting Clearance Lights: Install the amber clearance lights on the sides of your trailer as required by local regulations.
- License Plate Bracket: Attach the license plate bracket to the designated tail light or trailer frame, ensuring the license plate light illuminates the plate.
- Wiring Connection: Use the 22ft+4ft wiring harness to connect the lights to your vehicle's electrical system. Refer to the wiring diagram below for correct connections.
- Grounding: Ensure a secure ground connection for all lights. A common ground point on the trailer frame is recommended.
- Testing: After installation, test all light functions (stop, tail, turn signals, license plate light) to confirm proper operation before use.


Operating Instructions
The fouwick LED Trailer Light Kit operates automatically with your vehicle's electrical system. When connected correctly, the lights will perform the following functions:
- Tail Lights: Illuminate when your vehicle's headlights are on.
- Stop Lights: Illuminate brightly when the brake pedal is pressed.
- Turn Signals: Flash when the corresponding turn signal is activated.
- License Plate Light: Provides illumination for your license plate when tail lights are on.
- Side Marker/Reflector Lights: Enhance side visibility and act as reflectors.



Maintenance
The fouwick LED Trailer Light Kit is designed for minimal maintenance due to its durable and waterproof construction. However, regular checks are recommended:
- Regular Inspection: Periodically check all lights for proper function and ensure all connections are secure.
- Cleaning: Clean the light lenses with a soft cloth and mild soap to remove dirt and debris, ensuring maximum light output. Avoid abrasive cleaners.
- Wiring Integrity: Inspect the wiring harness for any signs of wear, cuts, or corrosion, especially after prolonged exposure to harsh conditions.


Troubleshooting
If you encounter issues with your trailer lights, consider the following common troubleshooting steps:
- No Lights or Dim Lights:
- Check all wiring connections for looseness or corrosion.
- Ensure the ground connection is clean and secure.
- Verify the vehicle's fuse for the trailer lights is intact.
- Confirm the vehicle's trailer light connector is clean and free of debris.
- Incorrect Light Function (e.g., brake light stays on):
- Re-check the wiring diagram to ensure all wires are connected to the correct terminals.
- Inspect for any short circuits in the wiring.
- Flickering Lights:
- Often indicates a loose or poor ground connection.
- Check for damaged wires or connectors.
If problems persist after attempting these steps, please contact customer support for further assistance.
Specifications
| Feature | Detail |
|---|---|
| Brand | fouwick |
| Model | Lights Kit (JTL012) |
| Light Source Type | LED |
| Voltage | 12V DC |
| Functions | Stop, Turn, Tail, Rear Reflector, Side Reflector, Side Marker, License Plate Light |
| Waterproof Rating | IP67 |
| Lens Material | Polycarbonate |
| Housing Material | ABS |
| Wiring Harness Length | 22ft + 4ft |
| Product Dimensions (L x W x H) | 4.73 x 3.95 x 2.78 inches |
| Item Weight | 2.35 pounds |
| Color | Red (lights), Clear (lens) |
| Automotive Fit Type | Universal Fit |
Warranty and Support
fouwick offers a 30-day money-back guarantee for any reason and a 12-month warranty for quality-related issues. If you experience any problems while using your submersible trailer tail lights, please do not hesitate to contact us. Your problem will be addressed and resolved within 24 hours.
For support, please refer to the contact information provided with your purchase or visit the official fouwick store on Amazon.