That's really helpful information. If I wanted to use this to feed a spare power supply in the front, would the black wire give me an earth?
I didnt check the black wire jim but you can take an earth from anywhere (eg. the power supply at the front) or just take it straight to the bodywork
I beleive, but you better test with a voltmeter, that red is perm live, black is perm ground and pink is switched ground controlled by the Body Control Module (BMC) which turns the lights on with things like open door, unlock car etc. I'd check in the Service Manual (download in FAQ section) as to what can be driven from it as I'm unsure as to what it is fused with. Footwell lighting like I'm doing with LEDs is generally safe as they pull next to no power
the red wire is red and black on mine which is a perm live, to do the footwell lighting connect the live to the red and black and the neg to the switched earth on the pink
will take some pics when it goes dark