'73'Brake/reverse lamps not working
 

I have just put the lights back on the 1973 911, the tail lights are working as is the turn signal/hazard.
No reverse and no brake lights, kind of a ***** as i'm just about to take it to the paint shop.
I have check all connections at the rear of the car, 7pin and lamp connections, all aprear to be o.k.
All the bulbs work, no fuses are blown.

Any thoughts?

time is running out. . .