1. Introduction
Thank you for choosing KKAIRA Car Rear Lights. This manual provides essential information for the proper installation, operation, and maintenance of your new rear light combination lamps, specifically designed for Scania G400 and G450 heavy trucks. These units include models 2380954 and 2241859, featuring integrated buzzer functionality. Please read this manual thoroughly before installation and use to ensure safety and optimal performance.

Image 1.1: Front view of the KKAIRA Car Rear Lights, showing the red housing and clear LED sections for brake, turn, and reverse functions.
2. Safety Information
Always observe the following safety precautions to prevent injury or damage to the product and vehicle:
- Ensure the vehicle's power system is completely off and the battery is disconnected before beginning any installation work.
- Wear appropriate personal protective equipment (PPE), such as safety glasses and gloves, during installation.
- Verify the voltage compatibility (24V) before connecting the lights to the vehicle's electrical system.
- Do not modify the product in any way. Unauthorized modifications may void the warranty and pose safety risks.
- If you are unsure about any step of the installation process, consult a qualified automotive technician.
3. Package Contents
Verify that all components are present and undamaged upon opening the package:
- 1 x KKAIRA Car Rear Light (Right Side)
- 1 x KKAIRA Car Rear Light (Left Side)
- Installation Hardware (if applicable, e.g., nuts, bolts, washers)
- This User Manual

Image 3.1: The two rear light units, highlighting their compatibility with Scania G400 and G450 models.
4. Setup and Installation
Follow these steps for proper installation of the KKAIRA Car Rear Lights:
- Preparation: Park the truck on a level surface and engage the parking brake. Disconnect the negative terminal of the truck's battery to prevent electrical shorts.
- Remove Old Lights: Carefully unbolt and disconnect the wiring harness from the existing rear light assemblies. Note the orientation and wiring connections for reference.
- Identify Sides: Determine the correct light unit for the left (driver's) and right (passenger's) side of the truck.
- Mount New Lights: Position the new KKAIRA rear light assembly into the designated mounting area. Secure it using the existing mounting points and hardware. The rear of the light unit features integrated studs for mounting.
- Connect Wiring: Connect the wiring harness from the truck to the new light assembly. Ensure all connections are secure and match the original configuration. These lights are designed for "Plug and Play" installation, minimizing the need for complex wiring.
- Test Functionality: Reconnect the truck's battery. Turn on the ignition and test all light functions: brake lights, turn signals (left and right), reverse lights, and running lights. Verify the buzzer functionality for reverse.
- Final Check: Ensure all bolts are tightened and the lights are securely mounted.

Image 4.1: Orientation guide for left (driver's side) and right (passenger's side) rear light installation.

Image 4.2: Underside view of the rear light, illustrating the mounting studs and overall robust construction.
The product is designed for non-destructive installation and does not require additional coding for most Scania G400/G450 models.
5. Operating Instructions
The KKAIRA Car Rear Lights operate in conjunction with your truck's existing electrical system. No special operation is required beyond the standard use of your vehicle's lighting controls.
- Running Lights: Activate automatically with the vehicle's headlights or parking lights.
- Brake Lights: Illuminate when the brake pedal is pressed.
- Turn Signals: Flash when the turn signal lever is engaged (left or right).
- Reverse Lights: Illuminate when the vehicle is shifted into reverse gear. The integrated buzzer will also sound during reverse operation.

Image 5.1: Visual representation of the various light functions (running, brake, turn, reverse) in operation.
6. Maintenance
The KKAIRA Car Rear Lights are designed for durability and require minimal maintenance. Follow these guidelines to ensure longevity:
- Cleaning: Clean the light lenses regularly with a soft cloth and mild soap solution to remove dirt and debris. Avoid abrasive cleaners or harsh chemicals that could damage the lens.
- Inspection: Periodically inspect the lights for any signs of damage, loose connections, or corrosion. Ensure mounting bolts remain tight.
- Waterproof Design: The lights feature an IP67 waterproof rating, providing protection against dust and water ingress. However, avoid high-pressure washing directly onto the light seals.

Image 6.1: Illustration of the product's robust features, including IP67 waterproof, dust-proof, and shock-proof capabilities.
7. Troubleshooting
If you encounter issues with your KKAIRA Car Rear Lights, refer to the following common problems and solutions:
Problem | Possible Cause | Solution |
---|---|---|
Lights not illuminating | Loose wiring connection, blown fuse, faulty switch, incorrect voltage. | Check all wiring connections. Inspect vehicle's fuse box for blown fuses and replace if necessary. Verify switch functionality. Ensure 24V power supply. |
Buzzer not working | Wiring issue to buzzer, faulty buzzer component. | Check wiring to the buzzer. If wiring is secure, the buzzer component may need replacement. |
Intermittent operation | Loose connection, corrosion on terminals. | Inspect and secure all electrical connections. Clean any corroded terminals. |
If the problem persists after attempting these solutions, please contact customer support.
8. Specifications
Key technical specifications for the KKAIRA Car Rear Lights:
- Brand: KKAIRA
- Model Numbers: 2380954, 2241859
- Application: Scania G400, Scania G450 Heavy Trucks
- Voltage: 24V
- Position: Rear (Right and Left)
- Features: Tail Light, Brake Light, Turn Signal, Reverse Light, Integrated Buzzer
- Durability: Waterproof (IP67), Dust-proof, Shock-proof
- Installation: Plug and Play, Non-destructive

Image 8.1: Overview of key product features and benefits, including ease of installation and enhanced durability.
9. Warranty and Support
For warranty information or technical support, please contact your point of purchase or visit the official KKAIRA website. Keep your purchase receipt as proof of purchase for any warranty claims.
Contact Information:
- Manufacturer: KKAIRA
- Customer Service: Refer to seller information on your purchase platform or KKAIRA's official channels.