Finally got a chance to dig into the XF last few days. Found that the drivers side brake light socket is loose , contact tab is bent excessively. Bent the tang up a bit and so far is working , if it goes out again i'm just going to replace the harness. ( BIG shout out to forum member Red Dog btw , I reached out to him for a possible replacement harness and he was more then helpful and quick to find/offer up a harness. Seems like a prime example of a great to deal with forum member/seller. Thanks again ! )

Next changed out the yellow relay and the brake light switch and bingo , brake lights work as intended now and all the warning lights went out.

Next on the hit parade is a replacement front grill , front fenders.