wiring diagram for rear lights to Ford Modeo 2005 1.8 estate?

I am fitting a tow bar and need to know the colour coding for the wiring loom e.g., at the lights them self it shows the same colour for the near and offside indicators. Can someone please tell me where I can go to find a diagram showing me the colour coding for the rear lights as they come out of the wiring loom. Thankyou.