Morimoto XB LF350
Morimoto XB LED Taillights Instruction Manual
Model: XB LF350
1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your Morimoto XB LED Taillights. These taillights are designed to replace factory lighting systems in compatible Ford Superduty models from 2017-2021, offering enhanced illumination and visibility.
The Morimoto XB LED Taillights integrate LED chips for clear light output. They feature a bright red light for brake and tail functions, an intense white light for reverse, and distinct turn signals. Constructed from high-quality materials, these taillights are built for durability and are waterproof.
2. Compatibility
These Morimoto XB LED Taillights (Model LF350) are specifically designed for:
- Vehicle Type: Ford Superduty
- Model Years: 2017-2021
- Fit Type: Vehicle Specific Fit
3. Package Contents
Verify that all components are present before beginning installation:
- Morimoto XB LED Taillight Assemblies (Left and Right)
- Installation Hardware (if applicable, though product is "Plug and Play")
- Instruction Manual (this document)

Figure 3.1: Morimoto XB LED Taillight Assemblies (pair).
4. Setup and Installation
The Morimoto XB LED Taillights are designed for a "Plug and Play" installation, meaning no complex wiring modifications are typically required. However, basic automotive knowledge and tools are recommended.
4.1 Safety Precautions
- Ensure the vehicle's ignition is off and the parking brake is engaged.
- Disconnect the vehicle's battery before starting any electrical work to prevent accidental short circuits.
- Wear appropriate personal protective equipment, such as gloves and eye protection.
4.2 Installation Steps
- Access Existing Taillights: Locate and remove any fasteners securing the factory taillight assembly. This typically involves screws or clips accessible from the outside or inside the truck bed.
- Disconnect Wiring: Carefully disconnect the electrical connector(s) from the back of the factory taillight assembly.
- Remove Factory Taillight: Gently pull the factory taillight assembly straight out from the vehicle.
- Connect Morimoto Taillight: Connect the wiring harness of the Morimoto XB LED Taillight to the vehicle's existing electrical connector. Ensure a secure and proper connection.
- Install Morimoto Taillight: Align the new Morimoto taillight assembly with the mounting points on the vehicle and push it firmly into place.
- Secure Taillight: Reinstall any fasteners removed in step 1 to secure the new taillight assembly.
- Repeat for Other Side: Follow the same steps for the opposite side taillight.
- Reconnect Battery: Once both taillights are securely installed and connected, reconnect the vehicle's battery.

Figure 4.1: Morimoto XB LED Taillight installed on a Ford Superduty, showing the side profile.

Figure 4.2: Rear view of a Ford Superduty with Morimoto XB LED Taillights installed.
5. Operating Instructions
After installation, test all functions of the Morimoto XB LED Taillights to ensure proper operation.
- Tail Lights: Activate your vehicle's headlights/parking lights. The taillights should illuminate with a red light.
- Brake Lights: Depress the brake pedal. The red light in the taillights should intensify.
- Reverse Lights: Shift the vehicle into reverse. The white reverse lights should illuminate.
- Turn Signals: Activate the left and right turn signals. The amber (or red, depending on regional variant/design) turn signal portion of the taillights should flash.

Figure 5.1: Morimoto XB LED Taillights illuminated, demonstrating their light output.
6. Maintenance
Morimoto XB LED Taillights require minimal maintenance due to their durable construction and LED technology. Regular inspection and cleaning will help maintain their appearance and performance.
- Cleaning: Clean the lens with a soft cloth and mild automotive soap and water. Avoid abrasive cleaners or harsh chemicals that could damage the polycarbonate lens.
- Inspection: Periodically check the taillights for any signs of damage, loose connections, or condensation inside the housing.
- Waterproof Feature: The taillights are designed to be waterproof. Ensure the seals are intact and not compromised during installation or use.
7. Troubleshooting
If you encounter issues with your Morimoto XB LED Taillights, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Taillight not illuminating | Loose electrical connection, blown fuse, incorrect installation. | Check all electrical connections. Inspect vehicle's fuse box for a blown fuse related to taillights. Re-verify installation steps. |
| Flickering lights | Unstable electrical connection, voltage fluctuations. | Ensure connections are secure. Consult a professional automotive electrician if the issue persists. |
| Condensation inside lens | Temperature changes, compromised seal. | Minor condensation may dissipate. If persistent or excessive, inspect the seal for damage. Contact support if the issue does not resolve. |
For issues not listed above or if solutions do not resolve the problem, contact Morimoto customer support.
8. Specifications
| Attribute | Value |
|---|---|
| Brand | Morimoto |
| Model | XB (LF350) |
| Color | Smoke Lens, Red/White Light Output |
| Specific Uses For Product | Taillight |
| Vehicle Service Type | Car (Ford Superduty) |
| Special Feature | Waterproof |
| Wattage | 12.6 watts |
| Auto Part Position | Rear |
| Lens Material | Polycarbonate |
| Assembly Required | No |
| Item Weight | 14 pounds |
| Package Dimensions | 22 x 19 x 7 inches |
| UPC | 840203396933 |
| First Available Date | April 10, 2023 |
9. Warranty and Support
For information regarding product warranty, returns, or technical support, please refer to the official Morimoto website or contact their customer service department directly. Keep your proof of purchase for any warranty claims.
Morimoto Official Website: www.morimotohid.com
Contact Information: Refer to the website for the most current contact details.
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