How can I found the keyless entry code for my 05 Lincoln navigator
Your keyless entry code sticker from the factory is located in 2 places one is put on your rear hatch, which is normally peeled off by the original owner. The second is on your main computer. You could just take it to any Ford Lincoln dealer with proof of ownership ex. registration. And they will tell you.
Sometimes the code is on the passenger side of the car under the dash. Look behind the wiring for a white sticker with a five digit code.