BMW Repair: BMW 740I Electrical, point of intersection, bmw 740i

Question
My seat and mirror controls on my 93-740I run things backwards.  Left goes right, up goes down etc.  Can this reverse polarity be corrected at one central point of connection, or must I address this at each devise?

Answer
Key question is whether this just started or if it was this way when you bought it or when you did something else to it.

If just started, something likely went bad in a module.  

If you bought it this way, it's likely something got hooked up backwards at some time.  Look for a common point of intersection.