Thank you everyone. I took all offered info into consideration and took the BLIS module from old tailight assy and swapped it in my new to me assy. Other than those dang Ford connectors are hard on old arthritic fingers, it works like new. Appreciate the help.
2019 Ranger XLT. Changed left tailight after cracking lens. Blind spot cross traffic working. Replaced with assy that was for Blis/cross traffic assy. (The expensive one) All lights work, but now blis/CT does not. Was only 1 plug. Any ideas why blind spot won't work?