Electrical Expertise needed!

[mgstu]

Hi,

I have just bought my first Porsche a 1998 Boxster Tip, I have one very annoying problem, the door mirrors operate it reverse - exactly the opposite of which you would expect!

Flick the switch to select the left mirror and the right mirror adjusts - not just that but press the adjuster at the bottom, and the mirror tilts up, and of course press the adjuster at the top and the mirror tilts down.

To me this sounds like someone has made a connector in reverse somewhere, can it be that simple? And where is it? Is this an easy one to rectify?

Any help much appreciated, thanks.