Hyundai Elantra CN7 Window Relay Upgrade Review

Convenience Upgrade for Your Hyundai Elantra CN7

The Hyundai Elantra CN7, while a stylish and modern vehicle, can be made even more user-friendly with a simple yet effective upgrade: the one-touch automatic window relay. This modification allows for effortless operation of all windows, including those on the passenger and rear doors, which typically require manual control in the stock configuration. By installing a specialized relay, you can transform the daily driving experience, adding a touch of luxury and convenience without the need for complex switch replacements. This review details the installation process and benefits of adding this feature to your Elantra CN7.

Detailed Installation Process

This upgrade focuses on adding individual window relays to the passenger, rear passenger, and rear driver doors, totaling three doors for the enhancement. The process begins with identifying the specific wiring harness for each door. For the Elantra CN7, a notable detail is that some doors may not have a readily available ground wire within the door panel itself, necessitating an extension of the ground wire to the vehicle's chassis for a secure connection. The installation involves precise wire splicing and connection to the new relay modules.

Installation Process:

1. Identify and access the window switch wiring harness in each target door.
2. Carefully splice into the power, window up, and window down signal wires according to the relay manufacturer's specifications.
3. Connect the relay's corresponding color-coded wires to the vehicle's harness. For example, the window up signal wire from the switch is connected to the relay's input, and the relay's output is connected to the motor.
4. Extend and securely connect the relay's ground wire to a solid chassis ground point within the vehicle's cabin.
5. Test all window operations to ensure correct functionality and then neatly organize and secure all wiring.

For the passenger door, the wiring typically involves red for power, yellow for window up, and orange for window down. The relay's yellow wire connects to the switch-side up signal, and its brown wire connects to the motor-side up signal. The power wires (red and blue on the relay) are combined and connected to the vehicle's power source. A small adjustment to the 'object detection adjustment meter' on the relay can optimize the anti-pinch safety feature during window ascent.

The rear passenger door presents slightly different wire colors: pink for power, yellow for window up, and brown for window down. Similar to the front passenger door, the up signal wires (yellow on the relay for the switch side, brown for the motor side) are connected to the vehicle's yellow up wire. The down signal wires (white on the relay for the switch side, orange for the motor side) are connected to the vehicle's brown down wire. The power wires are again combined and connected to the pink power source, and the ground wire is extended to the chassis.

Finally, the rear driver's door shares similarities with the rear passenger door, with pink for power and yellow for window up. However, the down signal wire is green. The relay's yellow (switch) and brown (motor) wires connect to the vehicle's yellow up wire. The relay's white (switch) and orange (motor) wires connect to the vehicle's green down wire. The pink power wire is connected to the relay's combined red and blue power wires, and the ground wire requires extension to the chassis.

Results and Notable Features

Upon completion, all upgraded windows operate with a single touch, providing a seamless and convenient experience. The installation typically takes around an hour per door, depending on the complexity of wire routing and grounding. The ability to control all windows with a simple press, especially from the driver's seat, significantly enhances the car's usability. The anti-pinch feature, when properly adjusted, adds an extra layer of safety. This upgrade is a practical enhancement for any Elantra CN7 owner seeking added convenience.