Hello I'm Chris a Ford Employee and Certified Engine/Transmission Specialist.
Thanks for asking your question. I am eager to get your vehicle back up and running correct, I am here to help you out for a small fee far less than a dealership and easier on the wallet, so if this information is of aid PLEASE PRESS ACCEPT and help me out financially by paying the small fee. Please reply if further discussion is needed.
Make sure fuses 58 and 62 in the car are good. The GEM module needs to be checked via scan tool for trouble codes.
The light switch is the most probable cause for your concerns.
Lets just skip this wire harness issue for now and move on to the cluster lighting for a while. Most likely both are the same fault but we will need to verify for now.
It was fast because I am not at work and have time to help you. Tomoorow I can t reply until after 5pm cst
Will get to the bottom of this with some testing.
Hear from you tommorrow!