1. Introduction
This manual provides essential instructions for the installation, operation, and maintenance of the ZERTRAN Hazard Warning Light Switch, Model ZT-P0851. This replacement part is designed for specific Daewoo vehicles, corresponding to OEM part number 9623 1858. Please read this manual thoroughly before proceeding with installation or use to ensure proper function and safety.
2. Product Overview
The ZERTRAN Hazard Warning Light Switch is a direct replacement component designed to restore the functionality of your vehicle's hazard warning lights. It is engineered to meet or exceed original equipment specifications, ensuring reliable performance.
Key Features:
- Direct Replacement: Engineered for a precise fit and function in compatible Daewoo models.
- OEM Standard: Manufactured to match OEM part number 9623 1858.
- Quality Construction: Tested for durability and reliability before delivery.

Figure 2.1: Front view of the ZERTRAN Hazard Warning Light Switch, showing the red triangle symbol.
3. Specifications
| Attribute | Detail |
|---|---|
| Brand | ZERTRAN |
| Model Number | ZT-P0851 |
| OEM Reference Number | 9623 1858 |
| Compatibility | Specific Daewoo vehicles (verify part number for exact fitment) |
| Material | Durable automotive-grade plastic and electronic components |
| Origin | China |
4. Setup and Installation
Disclaimer: Installation of automotive electrical components can be complex. If you are not experienced with vehicle electrical systems, it is highly recommended to seek professional assistance for installation to prevent damage to the component or your vehicle.
Required Tools (May Vary):
- Flathead screwdriver or trim removal tool
- Phillips head screwdriver (if applicable)
- Gloves (optional, for cleanliness)
Installation Steps:
- Safety First: Before beginning, ensure the vehicle's ignition is off and the battery's negative terminal is disconnected to prevent electrical shorts or injury.
- Locate Existing Switch: Identify the location of the existing hazard warning light switch in your vehicle's dashboard or console.
- Remove Trim Panel: Carefully use a trim removal tool or flathead screwdriver to pry off any surrounding trim panels that obstruct access to the switch. Work slowly to avoid scratching or damaging the interior.
- Disconnect Old Switch: Once accessible, gently press any retaining clips or tabs and pull the old hazard switch out of its mounting location. Disconnect the electrical connector by pressing its release tab and pulling it away from the switch.
- Inspect New Switch: Compare the new ZERTRAN switch (Model ZT-P0851) with the old one to ensure they match in shape, size, and connector type.

Figure 4.1: Rear view of the switch, highlighting the electrical connector for comparison.

Figure 4.2: Top-down angled view of the switch, showing its overall form factor.
- Connect New Switch: Align the electrical connector with the new ZERTRAN switch and push firmly until it clicks into place. Ensure a secure connection.
- Install New Switch: Insert the new switch into its mounting location in the dashboard or console. Push firmly until it snaps securely into place.

Figure 4.3: Angled view showing the red backplate, indicating the switch's depth and design.
- Reinstall Trim Panel: Carefully reattach any trim panels removed earlier, ensuring all clips are properly aligned and secured.
- Reconnect Battery: Reconnect the vehicle's negative battery terminal.
- Test Functionality: Turn the vehicle's ignition to the "ON" position (engine off) and press the hazard warning light switch. Verify that all turn signals flash simultaneously and that the switch illuminates correctly (if applicable). Press again to turn off.

Figure 4.4: Angled front view of the installed-like switch, for final appearance reference.
5. Operating Instructions
The ZERTRAN Hazard Warning Light Switch operates identically to the original equipment switch.
- To Activate: With the vehicle's ignition on or off (depending on vehicle model), press the hazard warning light switch button. All four turn signal lights (front and rear) will flash simultaneously. The switch itself may also illuminate.
- To Deactivate: Press the hazard warning light switch button again. The flashing will stop, and the switch illumination will turn off.
Hazard warning lights are typically used to indicate a stopped or disabled vehicle, or to warn other drivers of a dangerous situation. Refer to your vehicle's owner's manual for specific usage guidelines.
6. Maintenance
The ZERTRAN Hazard Warning Light Switch is designed for long-term, maintenance-free operation. However, following these general guidelines can help ensure its longevity:
- Keep Clean: Periodically wipe the switch surface with a soft, dry cloth to remove dust and grime. Avoid using harsh chemicals or abrasive cleaners.
- Avoid Moisture: Prevent liquids from entering the switch mechanism, as this can cause electrical malfunction.
- Gentle Operation: Operate the switch with a gentle press; excessive force is unnecessary and can potentially damage the internal mechanism over time.
7. Troubleshooting
If you experience issues with your hazard warning light switch after installation, consider the following:
- Switch Does Not Activate:
- Ensure the electrical connector is fully seated and secure.
- Check the vehicle's fuse box for a blown fuse related to the hazard lights or turn signals. Replace if necessary.
- Verify that the vehicle's battery is properly connected and charged.
- Lights Flash Incorrectly (e.g., too fast, only one side):
- This usually indicates a problem with the turn signal bulbs themselves (e.g., a burnt-out bulb). Check all four turn signal bulbs.
- A faulty flasher relay (if your vehicle uses one) could also be the cause.
- Switch Illumination Not Working:
- Some switches have a separate bulb for illumination. If the hazard function works but the light does not, the illumination bulb may be faulty.
If troubleshooting steps do not resolve the issue, it is recommended to consult a qualified automotive technician for diagnosis and repair.
8. Warranty and Support
ZERTRAN stands behind the quality of its products.
- Warranty: This product comes with an 18-month unlimited mileage warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
- Customer Support: For any questions regarding installation, compatibility, or warranty claims, please contact ZERTRAN customer service. Refer to your purchase documentation for specific contact information.
Please have your product model number (ZT-P0851) and purchase details ready when contacting support.