Had an odd electrical problem with the Boxster a few days ago that took a bit of finding.
I decided to check all the bulbs were ok as the MOT isnt too far away.
Replaced a number plate bulb, then checked the rear lights. The fog light wasnt working, so checked the fuse and the bulb which were ok.
A bot of further delving showed I actually had four brake lights instead of two. One of the o.s ones was where the fog lamp should be and one of the n/s ones was where a foglamp would be on a lhd car.
Eventually I noticed the outer insulation had been stripped back on both clusters, so had a look.
Someone had chopped though the fog light feed and left it loose in the loom, but also chopped through some of the other wires and then joined them up again to the wrong colour wires.
I undid the mess and joined all the wires up to their corresponding coloured wires.
Lo and behold I now have one pair of brake lights and an o/s fog light just as Porsche intended.
Why anyone would want to do this, and how it ever passed an MOT I cant begin to imagine.