Offroad-Express

My dash light wasnt coming on when i flicked the diff lock switch in my manual td42 gq y60 safari. I did all the diagnostics and worked out the rear factory diff was working perfectly so assumed blown bulb in dash. When i took out instrument cluster there was no bulb or bulb holder. But there was one in the AT temp warning hole. I swapped that one into the diff lock space and all works - diff lock engages and dash light comes on. I assume because i have a manual that the AT temp warning circuit is redundant....or does it serve another purpose? If so where can i get another tiny little wedge bulb holder thingy that fits the safari dash?
Cheers

Nope your fine....I'd say the dash has been out before and theybputbthe holder back in behind the wrong symbol.