What colour is the switch live in the wiring loom on a my02?

Im asking cause i want to wire a snooper off it

 

Without wishing to pee on your chips, if you can't test which is the right wire I wouldn't be playing with the wiring loom.

Easiest place to take a tap is from behind the fusebox - have a prod with a multimeter and you'll find a switched live. Don't forget to fuse your supply