Keyless Touchpad Lock How Do You Reprogram The Keyless Entry Touch Pad On A 1997 Ford Windstar?

How do you reprogram the keyless entry touch pad on a 1997 Ford Windstar? - keyless touchpad lock

We bought the car used and do not come with owner's manual or the key on the remote control door lock.

I had the opportunity to buy the keychain on eBay that comes with your own set of instructions for programming, but the truck is also equipped with the keyless door touchpad driver side.

I have no idea how to program the new system and not that the instructions will Keychain believe in any way.

I would appreciate it if you can offer assistance.