1. Introduction
Thank you for choosing AHLTD 5050 13SMD LED Car Bulbs. These high-quality LED bulbs are designed to provide ultra-bright illumination and a long lifespan for various automotive lighting applications. This manual provides essential information for the safe and effective installation, operation, and maintenance of your new LED bulbs.
2. Safety Information
- Always ensure the vehicle's ignition is off and the battery is disconnected before attempting any electrical installation.
- Wear appropriate safety gear, such as gloves and eye protection, during installation.
- Do not touch the LED chips directly when the bulb is illuminated, as they can be hot.
- Ensure proper polarity during installation to avoid damage to the bulb or vehicle's electrical system.
- Do not exceed the recommended voltage (DC 12V) to prevent damage to the bulb.
3. Package Contents
Your package includes:
- 2, 4, 10, or 20 pieces of 5050 13SMD Car LED Light bulbs (quantity and color as selected).
Please verify that all components are present and undamaged upon opening the package.
4. Specifications
| Feature | Specification |
|---|---|
| Item Type | 5050 13SMD LED Bulb |
| Model Name | 1156/1157 5050 13SMD |
| OEM Number | 11B949101 |
| Color Options | White, Red, Yellow, Blue, Crystal Blue |
| SMD Type | 5050 SMD |
| Dimensions (L x D) | 41mm x 15mm |
| Luminous Flux | 400 Lumens |
| Waterproof Rating | IP65 |
| Power | 3W |
| Voltage | DC 12V |
| Color Temperature | 5500-7000K |
| Current | 0.95±0.30mA |
| Lifespan | 50000H |
| Interface Type | BA15S (1156), BAY15D (1157) |
| Compatibility | Universal for All Cars |
4.1 Bulb Dimensions and Base Types
The bulbs are 41mm in length and 15mm in diameter. They are available in two common base types:
- BA15S (1156): Single Contact Bayonet
- BAY15D (1157): Dual Contact Bayonet

Image: Dimensions and base types for BA15S (1156) and BAY15D (1157) bulbs.

Image: LED chip design for high brightness and light effect.

Image: Heat dissipation design for extended bulb life.

Image: Illustration of the IP65 waterproof rating.
5. Installation
These LED bulbs are designed for easy installation. Follow these general steps, referring to your vehicle's specific service manual for detailed instructions on accessing and replacing bulbs:
- Identify Bulb Type: Confirm whether your vehicle requires BA15S (1156) or BAY15D (1157) bulbs.
- Locate Bulb Housing: Access the appropriate light housing (e.g., brake light, reverse light, turn signal) in your vehicle.
- Remove Old Bulb: Carefully remove the old incandescent bulb by twisting or pulling it out, depending on the socket type.
- Insert New LED Bulb: Insert the new LED bulb into the socket. Ensure it is seated correctly. For BA15S (single contact), align the pins. For BAY15D (dual contact), align the offset pins.
- Test Functionality: Before reassembling the housing, test the new LED bulb to ensure it illuminates correctly.
- Secure Housing: Reassemble the light housing and any removed panels.
Note: Some vehicles may require load resistors for turn signal applications to prevent hyper-flashing or error messages due to the lower power consumption of LED bulbs.
6. Operation
AHLTD LED bulbs provide instant-on, bright illumination for enhanced visibility and safety. They are suitable for a wide range of automotive lighting functions:
- Brake lights
- Reverse lights
- Backup lights
- Turn signal lights
- Tail lights
- Dome lights
- Trunk lamps
- Clearance lights
- Additional brake lights
- Daytime running lights (DRL)
- Parking lights
- Fog lamps
- License plate lights
6.1 Visual Demonstration of Light Colors
The following video demonstrates the various colors available for these LED bulbs when powered:
Video: Demonstration of LED bulb colors (Yellow, Red, Green, White, Blue) when connected to power.
6.2 Examples of Bulb Applications

Image: Overview of LED bulbs and their application as brake and reverse lights.

Image: Car with bright LED tail and reverse lights.

Image: Various emitting colors of the LED bulbs.

Image: Car with bright yellow LED lights.
7. Maintenance
AHLTD LED bulbs are designed for long-term, maintenance-free operation. However, consider the following to ensure optimal performance:
- Cleaning: If necessary, gently wipe the bulb's surface with a soft, dry cloth. Avoid abrasive cleaners or solvents.
- Inspection: Periodically check the bulbs for any signs of damage or loose connections.
- Waterproof Integrity: Ensure bulbs are properly installed to maintain their IP65 waterproof integrity, especially after any vehicle maintenance.
8. Troubleshooting
If you encounter issues with your LED bulbs, refer to the following common problems and solutions:
- Bulb Not Lighting Up:
- Check the polarity. LED bulbs are polarity-sensitive; try rotating the bulb 180 degrees in the socket.
- Ensure the bulb is fully seated in the socket.
- Verify the vehicle's fuse for the corresponding light is intact.
- Check for proper electrical connection to the bulb socket.
- Flickering or Hyper-flashing (Turn Signals):
- This is common with LED turn signals due to their lower power draw. Your vehicle's flasher relay may interpret the lower current as a burnt-out bulb.
- Install a load resistor (not included) in parallel with the LED bulb to simulate the resistance of an incandescent bulb.
- Error Message on Dashboard:
- Some newer vehicles have CANBUS systems that detect bulb outages. If an error message appears, you may need CANBUS-compatible LED bulbs or load resistors.
- Dim Light Output:
- Ensure the vehicle's voltage is stable at 12V DC.
- Check for any corrosion in the bulb socket that might impede electrical flow.
9. User Tips
- Always double-check your car's original bulb type (e.g., 1156 or 1157) before purchasing to ensure compatibility.
- These bulbs are noted for being very bright, making them an excellent upgrade for reverse lights to improve visibility when backing up.
- For brake lights, the red bulbs provide a clear and intense signal.
- If using for turn signals and experiencing rapid flashing (hyper-flashing), a load resistor may be necessary to correct the flash rate.
10. Warranty and Support
For detailed product information, troubleshooting guides, or warranty claims, please refer to the official user manual available in PDF format:
For further assistance, please contact AHLTD customer support through your purchase platform.