United Pacific 31222
UNITED PACIFIC 31222 LED Fog Light User Manual
Model: 31222
Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your United Pacific 31222 LED Fog Light. This fog light assembly is designed for the left-hand side of 2008-2017 Freightliner Cascadia trucks, enhancing visibility and safety.
Safety Information
Always prioritize safety during installation and operation. Read all instructions carefully before beginning. Disconnect the vehicle's battery before performing any electrical work. Wear appropriate personal protective equipment, such as safety glasses and gloves. Ensure the vehicle is parked on a level surface with the parking brake engaged.
- Do not look directly into the LED light when it is illuminated.
- Ensure all connections are secure and properly insulated to prevent short circuits.
- Consult a qualified technician if you are unsure about any installation steps.
Product Overview
The United Pacific 31222 is a high-quality LED fog light assembly designed as a direct replacement for the left-hand (driver's side) fog light on Freightliner Cascadia models from 2008 to 2017. It features durable construction and bright LED illumination for improved road visibility in adverse weather conditions.

Image: United Pacific 31222 LED Fog Light. This image shows the clear lens and black housing of the fog light assembly.
Setup and Installation
This product is designed for straightforward installation. No assembly is required for the light unit itself.
Tools Required:
- Basic hand tools (e.g., screwdriver, wrench set)
- Wire cutters/strippers (if wiring modifications are needed)
- Electrical tape or heat shrink tubing
Installation Steps:
- Park the vehicle on a level surface and engage the parking brake.
- Disconnect the negative terminal of the vehicle's battery to prevent electrical hazards.
- Locate the existing fog light assembly on the left-hand side of the vehicle.
- Carefully remove any fasteners or clips securing the old fog light.
- Disconnect the electrical connector from the old fog light.
- Remove the old fog light assembly.
- Connect the electrical connector from the vehicle to the new United Pacific 31222 LED Fog Light. Ensure a secure connection.
- Position the new fog light assembly into its mounting location.
- Secure the new fog light using the original fasteners or clips.
- Reconnect the negative terminal of the vehicle's battery.
- Test the new fog light to ensure it functions correctly.
Note: Specific removal and installation procedures may vary slightly depending on the exact year and trim of your Freightliner Cascadia. Refer to your vehicle's service manual for detailed instructions if necessary.
Operating Instructions
The United Pacific 31222 LED Fog Light operates in conjunction with your vehicle's existing fog light switch and electrical system. Once installed, it will function like the original equipment fog light.
- Turn on your vehicle's ignition.
- Activate the fog lights using the dedicated fog light switch in your vehicle's cabin.
- The LED fog light should illuminate, providing additional forward illumination.
- Turn off the fog lights using the same switch when they are no longer needed.
Important: Fog lights are intended for use in conditions of reduced visibility, such as fog, heavy rain, or snow. Avoid using fog lights during clear conditions as they can cause glare for oncoming traffic.
Maintenance
The United Pacific 31222 LED Fog Light is designed for minimal maintenance. Its LED technology ensures a long lifespan.
- Cleaning: Periodically clean the lens of the fog light with a soft cloth and mild soap and water to remove dirt and debris. Avoid abrasive cleaners that could scratch the lens.
- Inspection: Regularly inspect the fog light for any signs of damage, loose connections, or corrosion. Ensure the mounting is secure.
- Waterproof Feature: The light is designed to be waterproof. However, avoid directing high-pressure water sprays directly at the light for extended periods, especially around seals.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Fog light does not illuminate. |
|
|
| Light flickers or is dim. |
|
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| Moisture inside the lens. |
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|
If troubleshooting steps do not resolve the issue, contact United Pacific customer support or a certified automotive technician.
Specifications
| Feature | Detail |
|---|---|
| Brand | United Pacific |
| Model Number | 31222 |
| Product Type | LED Fog Light Assembly |
| Vehicle Compatibility | 2008-2017 Freightliner Cascadia (LH - Driver Side) |
| Light Source | LED |
| Color | Clear Lens |
| Wattage | 10W (1E+1) |
| Special Feature | Waterproof |
| Dimensions (L x W x H) | 8 x 6.3 x 5.8 inches |
| Item Weight | 1.74 pounds |
| Assembly Required | No (for the light unit) |
| UPC | 710270312221 |
Warranty and Support
United Pacific stands behind the quality of its products. For specific warranty details, please refer to the warranty information provided at the time of purchase or visit the official United Pacific website.
Returns:
This product typically qualifies for 30-day easy returns through the retailer where it was purchased, subject to their return policy.
Customer Support:
For technical assistance, installation questions, or warranty claims, please contact United Pacific customer support. Contact information can usually be found on the product packaging or their official website.
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