1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your ALTBET Turn Signal Combination Switch, Model A06-44025-000. Please read these instructions carefully before proceeding with installation or use to ensure proper function and safety.
2. Product Overview
The ALTBET Turn Signal Combination Switch is a multi-functional control device designed for specific Freightliner truck models. It integrates controls for turn signals, hazard lights, and potentially other functions like high beams or wipers, depending on the vehicle's configuration. This component is a direct replacement part, engineered to meet original equipment specifications for fit and performance.

Figure 2.1: Angled view of the ALTBET Turn Signal Combination Switch, showing the lever and base unit.
3. Compatibility
This turn signal combination switch is compatible with the following Freightliner truck models and years:
- Freightliner Century Class: 1996-2010
- Freightliner Columbia: 2001-2015
- Freightliner MT35: 2004-2009
- Freightliner MT45: 2004-2014
- Freightliner MT55: 2004-2014
Replacement Part Numbers: This switch replaces the following part numbers:
- 57746002
- S20022
- 978-5211
- S-20022
- A06-44025-000
- A0644025000
- 999496
Important: Always verify compatibility with your vehicle's specific make, model, and year before purchasing and installing. Consult your vehicle's service manual or a qualified technician if unsure.
4. Installation (Setup)
Installation of this turn signal combination switch requires basic automotive repair knowledge and tools. While designed for direct replacement, professional installation is highly recommended to ensure correct wiring and functionality, preventing potential damage to the vehicle's electrical system or the component itself.
4.1 Safety Precautions
- Disconnect the vehicle's battery before beginning any electrical work to prevent short circuits or electrical shock.
- Wear appropriate personal protective equipment, such as gloves and eye protection.
- Ensure the vehicle is parked on a level surface with the parking brake engaged.
4.2 Installation Steps
- Access the Steering Column: Depending on your Freightliner model, you may need to remove steering column covers or dashboard panels to access the existing turn signal switch. Refer to your vehicle's service manual for specific instructions.
- Disconnect Wiring: Carefully disconnect the electrical connectors from the old turn signal switch. Note the orientation and connection points if not clearly marked.
- Remove Old Switch: Unfasten any screws, clips, or mounting hardware securing the old switch to the steering column. Gently pull the old switch free.
- Install New Switch: Position the new ALTBET combination switch (Model A06-44025-000) into the mounting location. Ensure it seats correctly and aligns with all mounting points.
- Secure New Switch: Fasten the new switch using the original screws, clips, or mounting hardware. Ensure it is securely in place and does not wobble.
- Connect Wiring: Reconnect the electrical connectors to the new switch. Ensure all connections are firm and correctly seated.
- Reassemble Panels: Reinstall any steering column covers or dashboard panels that were removed.
- Reconnect Battery: Reconnect the vehicle's battery.
- Test Functionality: Turn on the vehicle's ignition and test all functions of the new switch: turn signals (left/right), hazard lights, and any other integrated functions (e.g., high beams, wipers).

Figure 4.1: Side view of the switch, showing the lever and mounting points.

Figure 4.2: Rear view of the switch, highlighting the electrical connector pins for installation.
5. Operation
The ALTBET Turn Signal Combination Switch operates similarly to the original equipment. Familiarize yourself with the lever's positions and functions before driving.
- Turn Signals:
- Push the lever up for a right turn signal.
- Push the lever down for a left turn signal.
- The lever will typically return to the center position after the turn is completed, or can be manually canceled.
- Hazard Lights:
- Pull the lever out (towards the driver) to activate the hazard warning lights.
- Push the lever in (away from the driver) to deactivate the hazard warning lights.
- Headlight Functions (if applicable):
- High Beams: Lift the lever (as indicated by "LIFT" or a headlight symbol) to activate high beams.
- Flash-to-Pass: Briefly pull the lever towards you to flash the high beams.

Figure 5.1: Top view of the switch lever, showing "PULL" indicator for hazard lights and "LIFT" for high beams.
6. Maintenance
The ALTBET Turn Signal Combination Switch is designed for durability and requires minimal maintenance. Regular inspection and proper care can extend its lifespan.
- Cleaning: Keep the switch lever and surrounding area clean from dust and debris. Use a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners.
- Inspection: Periodically check the switch for any signs of physical damage, loose connections, or unusual operation.
- Professional Check: If you notice any intermittent functionality or unusual behavior, have the vehicle's electrical system and the switch inspected by a qualified technician.
7. Troubleshooting
If you experience issues with your turn signal combination switch, consider the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| Turn signals not working | Blown fuse, faulty bulb, loose wiring connection, faulty flasher relay, or faulty switch. | Check vehicle fuses. Inspect bulbs for damage. Verify wiring connections. Test flasher relay. If all else fails, the switch may need replacement or professional diagnosis. |
| Hazard lights not working | Blown fuse, faulty hazard switch mechanism, or faulty flasher relay. | Check vehicle fuses. Ensure the hazard lever is fully engaged. Test flasher relay. |
| Intermittent function | Loose electrical connection, worn internal contacts in the switch. | Inspect and secure all electrical connections. If the problem persists, professional diagnosis is recommended. |
If troubleshooting steps do not resolve the issue, it is advisable to consult a certified automotive technician for further diagnosis and repair.
8. Specifications
Key specifications for the ALTBET Turn Signal Combination Switch (Model A06-44025-000):
- Item Model Number: A06-44025-000
- Brand: ALTBET
- Operation Mode: Automatic
- Contact Type: Normally Open
- Connector Type: Plug In
- Terminal: Quick-connect
- Circuit Type: 2-way
- Mounting Type: Panel Mount
- Actuator Type: Hinge Lever
- International Protection Rating: IP00
- Number of Positions: 1
- Package Dimensions: 10.94 x 3.98 x 3.7 inches
- Item Weight: 1.15 Pounds

Figure 8.1: Bottom view of the switch, illustrating the panel mount design and quick-connect terminals.
9. Package Contents
The package for the ALTBET Turn Signal Combination Switch includes:
- 1x Turn Signal Combination Switch (Model A06-44025-000)
10. Warranty and Support
Specific warranty information for this product is typically provided at the point of purchase or included with the product packaging. Please refer to your purchase documentation for details regarding warranty coverage and terms.
For technical support or inquiries regarding this ALTBET product, please contact the seller or manufacturer through the platform where the purchase was made. Ensure you have your purchase details and product model number (A06-44025-000) available for faster assistance.