I bought a pair of Ford lighted scuff plates for my 2015 GT. The package stated that the car was prewired for the plates. I have the basic GT..I pulled the factory plates and inner plates, exposed the harness, and there were no connectors. Does anyone have any information on this?
I don't know about the 2015, but earlier models did not have the wiring if the car did not come with lighted door sills. Here are some instructions from classicdesignconcepts.com for installation of lighted sills that might help you.