O.K. guys, here's my question. How do I determine if my 2014 XLT Screw has the appropriate wiring harness so that I can install heated, Tow side mirrors with remote adjust and lights ?

 

I can't speak for the 14's. But I know every year up until 13 for sure has the wiring harness. They all do.

 

Also can't say for sure either, but we supply a lot of connectors to the auto industry. For cost savings they will generally use a single harness even if the particular vehicle build doesn't have all the accessories installed on it.