Dorman 923-359 Center High Mount Stop Light Instruction Manual

1. Product Overview and Compatibility

This manual provides instructions for the installation, operation, and maintenance of the Dorman 923-359 Center High Mount Stop Light. This replacement assembly is designed to function like the original equipment on compatible vehicles, ensuring proper visibility and safety.

Compatible Vehicles:

• Chevrolet S10: 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
• GMC Sonoma: 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003

Image 1.1: Front view of the Dorman 923-359 Center High Mount Stop Light assembly.

2. What's in the Box

The package for the Dorman 923-359 Center High Mount Stop Light includes:

• 1 Dorman 923-359 Center High Mount Stop Light Assembly

3. Safety Information

Before beginning any installation or maintenance, please observe the following safety precautions:

• Always disconnect the negative terminal of the vehicle's battery before performing any electrical work to prevent accidental shorts or injury.
• Wear appropriate personal protective equipment, such as safety glasses and gloves, to protect against potential hazards.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged to prevent unexpected movement.
• Refer to your vehicle's specific service manual for detailed procedures, torque specifications, and additional safety warnings.

4. Setup and Installation

This section outlines the general steps for installing the Dorman 923-359 Center High Mount Stop Light. Specific vehicle configurations may vary.

Tools Required:

• Basic hand tools (e.g., screwdriver set, socket wrench set, trim removal tool)
• Multimeter (optional, for electrical testing)

Installation Steps:

1. Preparation: Park the vehicle on a level surface and engage the parking brake. Disconnect the negative terminal of the vehicle's battery to prevent electrical shorts.
2. Access the Old Light: Locate the existing center high mount stop light. Depending on your vehicle model, this may involve removing interior trim panels or accessing fasteners from the exterior. Consult your vehicle's service manual for precise access instructions.
3. Remove Old Light: Carefully unfasten the mounting screws or clips securing the old light assembly. Disconnect the electrical connector by pressing the release tab and gently pulling the connector apart.
4. Inspect Wiring: Examine the vehicle's wiring harness and connector for any signs of corrosion, fraying, or damage. Repair any issues as necessary before proceeding.
5. Install New Light: Connect the electrical connector of the Dorman 923-359 assembly to the vehicle's harness. Ensure a secure and snug connection. Position the new light assembly into its mounting location and fasten it using the original mounting screws or clips. Do not overtighten.
6. Test Functionality: Reconnect the vehicle's negative battery terminal. Have an assistant press the brake pedal to verify that the new stop light illuminates correctly. Check for proper brightness and ensure no warning lights appear on the dashboard.
7. Final Assembly: Reinstall any removed trim panels or covers, ensuring they are securely fastened.

Image 4.1: Rear view of the Dorman 923-359 Center High Mount Stop Light showing wiring and connectors.

Image 4.2: Close-up view of the electrical connectors for the Dorman 923-359 Center High Mount Stop Light.

5. Operating Instructions

The Dorman 923-359 Center High Mount Stop Light operates automatically when the vehicle's brake pedal is pressed. It provides an additional visual signal to following drivers, indicating that the vehicle is slowing or stopping, thereby enhancing road safety.

No user interaction is required for its operation after proper installation. The light will illuminate whenever the brake pedal is engaged and extinguish when released.

6. Maintenance

To ensure the longevity and optimal performance of your Dorman 923-359 Center High Mount Stop Light, follow these maintenance guidelines:

• Regular Inspection: Periodically check the light assembly for any signs of physical damage, such as cracks in the lens, loose mounting, or excessive dirt accumulation. Ensure the lens is clear for optimal light output.
• Cleaning: Clean the exterior lens with a soft cloth and a mild automotive cleaning solution. Avoid using abrasive cleaners or harsh chemicals that could scratch or damage the plastic lens.
• Bulb Replacement: This unit utilizes a halogen bulb. If the light fails to illuminate, inspect the bulb for a broken filament. Replace with an equivalent halogen bulb (e.g., 12V, 50W, if applicable to the specific bulb type within the assembly) according to the vehicle's service manual or the bulb manufacturer's instructions. Always ensure the replacement bulb matches the original specifications to maintain proper function and avoid damage.

7. Troubleshooting

If you encounter issues with your Dorman 923-359 Center High Mount Stop Light, refer to the following troubleshooting steps:

• Light Does Not Illuminate:
  • Check the vehicle's fuse box for a blown fuse related to the brake lights. Replace if necessary with a fuse of the correct amperage.
  • Verify that the electrical connector to the light assembly is securely attached and free from corrosion.
  • Inspect the halogen bulb for a broken filament. Replace the bulb if it is faulty.
  • Using a multimeter, check for power at the connector when the brake pedal is pressed. If no power is detected, there may be an issue with the vehicle's wiring or brake light switch. Consult a qualified automotive technician.
• Light Flickers or is Dim:
  • Ensure all electrical connections, including the bulb contacts, are clean and tight.
  • Check for corrosion on the bulb contacts or within the electrical connector. Clean or replace components as needed.
  • Verify the vehicle's charging system is functioning correctly, as low voltage can affect light output.

8. Specifications

9. Warranty Information

The Dorman 923-359 Center High Mount Stop Light is backed by a Limited Lifetime Warranty from Dorman. This warranty covers defects in materials and workmanship under normal use and service.

For specific terms, conditions, limitations, and details on how to make a warranty claim, please refer to Dorman's official warranty documentation available on their website or contact Dorman customer support directly.

10. Support

For additional assistance, technical support, or inquiries regarding your Dorman 923-359 Center High Mount Stop Light, please utilize the following resources:

• Dorman Official Website: Visit www.dormanproducts.com for product information, FAQs, and support resources.
• Customer Service: Contact Dorman customer service directly for personalized assistance. Refer to the official website for current contact methods (phone, email, etc.).

When contacting support, please have your product model number (923-359) and vehicle information (make, model, year) readily available to expedite assistance.