Add power locks to non-equipped car?

I have a 99 Taurus LX that is not equipped with power locks. I want to add the locks. I know I'll need the actuators and switches. Does anyone know if the harness connections are already there? Are any relays required to be added for the keyless entry?
Thanks for the help!

I have a 99 Taurus LX that is not equipped with power locks. I want to add the locks. I know I'll need the actuators and switches. Does anyone know if the harness connections are already there? Are any relays required to be added for the keyless entry?
Thanks for the help!

Chances are you will have to do all the wiring of the car for the power locks your self. If you have access to wiring diagrams for you car exactly you maybe able to see if it has unused harness connections for the option of power locks.

I installed after-market door locks on my 97 G and found no extra wiring in the stock harness for them.

I had to run the individual cables to each door.

Look to see what JC Whitney has, they market items like you are asking about.