The Gentex Homelink mirror is a sophisticated rearview mirror that combines auto-dimming functionality with built-in HomeLink garage door control. Designed for users who seek convenience and safety in their daily driving experience, this mirror offers additional features such as map lighting, temperature display, and compass functionality. Installation of the mirror requires careful planning and a basic understanding of automotive wiring. This article provides an in-depth overview of the installation process, based on user experiences and technical instructions shared in online forums and manufacturer resources.
Overview of the Gentex Homelink Mirror
The Gentex Homelink mirror is a premium device that integrates several advanced features into a single unit. Its most notable feature is the HomeLink system, which allows users to control garage doors, gate openers, and other compatible devices using the mirror’s built-in buttons. In addition, the mirror includes an auto-dimming function that adjusts brightness based on the ambient light, reducing glare from headlights behind the vehicle. Some models also include a temperature sensor, map lighting, and a compass.
The model referenced in the source material is the Gentex 50-GENK60. Users have reported that this model offers a comprehensive set of features, including the ability to display the vehicle’s internal temperature and provide directional guidance via a digital compass. The mirror comes with a lengthy wiring harness, which allows for flexibility in routing the cables. However, the installation process is not trivial and requires attention to detail to ensure all components function correctly.
Installation Preparation and Components
Before beginning the installation, it is essential to ensure that all necessary components are included in the package. The Gentex Homelink mirror comes with a detailed wiring harness, which is designed to connect to various parts of the vehicle’s electrical system. The harness includes several color-coded wires for power, ground, and signal functions. Additionally, the mirror includes a temperature sensor that must be mounted in a location away from direct heat sources.
One user noted that the instructions included with the mirror were initially incorrect, leading to confusion during the installation process. After contacting Gentex customer support, the user was directed to an online resource for the correct instructions. This highlights the importance of verifying the completeness of the installation manual before proceeding.
The installation instructions can be accessed at the following link: Gentex Homelink Mirror Installation Guide. This document outlines the necessary steps for wiring the mirror and programming the HomeLink feature. It is recommended to print a copy of the instructions for reference during the installation.
Routing and Connecting the Wiring Harness
The first step in the installation process is to connect the wiring harness to the mirror. The harness includes a 10-pin connector that attaches to the mirror’s control module. However, not all of the 10 pins are used, and some users found that the full connector was too wide to fit under the headliner. In such cases, the excess portion of the connector can be trimmed using a hacksaw to make it more manageable.
Once the connector is trimmed, it can be routed under the headliner and along the passenger side of the vehicle. The wiring must be carefully routed to avoid interference with other components and to ensure that it remains hidden from view. The user in the source material routed the wires around the visor slit and along the outside of the pillar before bringing them down to the fuse area in the passenger footwell.
The temperature sensor must be mounted in a location that is away from the engine compartment and other heat sources. In the example provided, the user mounted the sensor near the fog light area. This location is ideal because it is close to the stock temperature probe location and away from the vehicle’s internal heat sources.
The power wiring for the mirror includes a red wire that must be connected to a switched power source, typically a fuse that is activated when the ignition is turned on. In the source material, the user tapped into the fan3 fuse in the underhood fuse box to provide power to the mirror. This ensures that the compass and temperature display will turn off when the vehicle is turned off.
In addition to the red power wire, there is a black ground wire that must be connected to a suitable grounding point. This is typically done by attaching the wire to a metal part of the vehicle’s frame or to a designated ground terminal in the fuse box.
Programming and Calibration
Once the wiring is complete, the next step is to program the HomeLink feature and calibrate the compass. The programming process for HomeLink involves pressing and holding the HomeLink button on the mirror until the LED indicator begins to flash. The user can then press the button on the original garage door opener to sync the signals. Once the signals are matched, the LED will stop flashing, indicating that the programming is complete.
The compass function requires either automatic calibration or manual calibration. According to the source material, the compass can automatically calibrate itself after about an hour of driving. If automatic calibration does not occur, the user can manually calibrate the compass by pressing a specific sequence of buttons on the mirror and then driving in a circle three times. This process helps the compass determine the vehicle’s orientation relative to magnetic north.
Final Steps and Testing
After all the wiring and programming steps are complete, the final step is to test the functionality of the mirror. The user should open the vehicle’s door to verify that the map lights are working correctly. If the map lights do not illuminate with the rest of the interior lights, the user may need to adjust a switch on a small black box that controls the lighting function. This box is typically located near the wiring harness and can be accessed by removing a small panel.
Once the map lights are functioning properly, the user can test the HomeLink feature by pressing the programmed button and observing whether the garage door opens or closes. If the garage door does not respond, the user should verify that the programming was completed correctly and that the garage door opener is within range.
Troubleshooting Common Issues
During the installation process, users may encounter several common issues that can affect the performance of the mirror. One such issue is incorrect wiring, which can result in the mirror not receiving power or failing to function properly. To address this, users should double-check all wiring connections and ensure that the correct fuses are being used.
Another common issue is the compass not calibrating correctly. This can occur if the user does not follow the calibration steps properly or if there is interference from other electronic devices in the vehicle. To resolve this, users should ensure that the vehicle is parked on a level surface and that there are no large metal objects near the vehicle that could interfere with the compass.
If the temperature display is not functioning as expected, users should verify that the temperature sensor is mounted in the correct location and that the wiring is not damaged. Additionally, users should ensure that the vehicle’s climate control system is functioning correctly, as the temperature display on the mirror is often linked to the vehicle’s internal temperature sensor.
Cost and Value Considerations
The Gentex Homelink mirror is considered a premium product, and its cost reflects the advanced features it offers. In the source material, users reported that the mirror can be purchased for around $45, including the wiring harness. While this price may seem high for a rearview mirror, users have noted that the convenience and functionality provided by the mirror justify the cost.
The mirror’s auto-dimming feature is particularly valuable for drivers who frequently encounter glare from vehicles behind them. This feature helps reduce eye strain and improves visibility, especially during nighttime driving. Additionally, the HomeLink feature provides a convenient way to control garage doors and other compatible devices without the need for a separate remote control.
For users who are concerned about the cost, it is worth noting that the mirror is often preferred by original equipment manufacturers (OEMs) and is available at a lower price on third-party marketplaces such as eBay. This makes it a more accessible option for those who want to add advanced functionality to their vehicles without paying a premium price.
Conclusion
The Gentex Homelink mirror is a valuable addition to any vehicle, offering a combination of advanced features that enhance both convenience and safety. While the installation process requires some technical knowledge and patience, the end result is a functional and reliable device that provides significant benefits. By following the detailed installation instructions and carefully routing the wiring, users can ensure that all components work together seamlessly.
For those who are new to automotive electronics or have limited experience with DIY installations, it is recommended to seek assistance from a qualified technician. However, for experienced users, the installation can be a rewarding project that adds value to their vehicle. With proper installation and calibration, the Gentex Homelink mirror can provide a long-lasting solution for drivers who want to improve their driving experience.