Build Your Own Remote Keyless Entry System

A blue car in a driveway.
  • 2-4 hours
  • Intermediate
  • 50-125

A keyless entry remote will add security to your car and provide a more convenient means of locking and unlocking car doors and windows. Newer cars may already have a remote keyless entry system, but older models can also be secured using this system.

Finding a Compatible Keyless Entry System

There are several ways to install a keyless system in a car, so make sure to get the most compatible keyless entry system for your car. Take note of the car’s brand and model when shopping online or in a store. Get as much information on which systems work and which do not. This can be done by reading related online forums, asking a mechanic, a friend, or a dealer. When the right type of keyless entry remote has been found, take into consideration how it can be installed. If the installation is a DIY project, make sure to get as much information about the product details.

Build Your Own

To save on the installation costs, build the system without the help of a mechanic. Read the product manual carefully and get the tools ready. The installation procedures on the manual will differ from one product to another, but the general steps are probably the same. Read on to get an idea of how to install the keyless entry remote system.

Step 1 - Locate the Locking Mechanism

The keyless entry system will have to be installed in the locking mechanism of the car. The location of this mechanism will depend on the car’s brand and model. Look in the trunk to find the panel or look in the driver’s kick panel. The panel will contain the locking mechanism and the wires that need to be connected to the keyless entry system.

Step 2 - Connect the Wires

The door lock actuator found in the panel has wires that control the lock and unlock function for the car door. Probe the wires to determine the lock and unlock wires. The wire that locks the doors is the lock wire. Connect the green wire from the system to this wire. The wire that unlocks the doors is the unlock wire. Connect the red wire from the system to this wire. The color of the wire to be connected to the wires on the panel may differ, so make sure to refer to the product manual for this information. Connect the black wire to a metal ground, and connect the electrical supply wire to the constant 12-V supply. Connect the receiver of the system, and close the panel.

Step 3 - Test the Keyless Entry Remote System

Follow the instructions provided by the manufacturer to test the system. Make sure that all connections are correct in order for it to work. Discover its other features as well to become familiar with all its functions.