Hi
Same problem, put just fixed mine, it seems to be a fault of fords putting the wrong interior light in the cab...there are two in the cab, the second one near the rear of the cab has three wire going into it, the middle wire black/yellow supplies the rear lights with postive, but if you notice, there is no contact from the light for that middle wire, that because ford have put in the wrong light, i corrected mine by cutting the middle wire, and wiring it to one of the other wires from that connector, there is another black/yellow, and another which I think was black!, contect it to the black one, and they will come on when you open all the doors, it now works perfect.
Gareth Hawkins, April 2010
