reverse lights not working (on automatic)

hole heep of faults with my on going project the fuse box was in a really bad way so replaced with a brad new one a few relays replaced and fings are starting to work again apart from the reverse lights not working    
just looking for known faults that any people have come across

any sort of help would be great

switch on gear box faulty , wires off switch , fuze blown , gear linkage not set up correctly to operate switch .

justseen this i have the same problem but mines not an auto!!

i cant find a switch on the gear box the fuse is alright wots the best way to see if power is getting to the switch on the gear stick

chudd said

switch on gear box faulty , wires off switch , fuze blown , gear linkage not set up correctly to operate switch .

where is the switch??

Isn't the switch on the shifter on autos, under the selector cover?