GSA 12 rear light wires?

[shedracer]

I need to hook up a wire specifically to the rear light wire, NOT the rear brake wire. Now having found my way to the back of the light, there is one brown/earth and two others.

Red and white

and

Black and white

Does anybody know which one is the tail light one?

Your help is much appreciated.
Thanks
Paul

 

[R1200GSA]

Stick a test lamp on either of them and you should see which is which?

 

[Pressurized]

I need to hook up a wire specifically to the rear light wire.

Be very careful how much current you draw from this wire. The Canbus expects to see a current of around 0.4A from the tail light. That isn't much and it might think there's a fault if you take more.