2000 Ford Ranger 2 to 3 lamp mod

I have a 2000 Ford Ranger with all red taillights and I noticed it has a lens not being used. I read if you get the harness for a Ranger or Mazda B-Series that has a amber rear turn singal its a plug and play and can have separate Turn and Brake. Please correct me if I am wrong. think it be cool to make my truck a little different. Thx.