Dash dials inop

[s12andy_s_]

well drove the s12 yesterday and everything working, took seats out today to do some work to it and started it up to get a bit of heat, so working away i looked at the dash and nowt was working, no oil press, temp or rev's? gave it a rev no difference, only thing that seems to be working is the petrol dial. also the battery light is staying on but belts are fine. you think it could be a fuse/wiring from taking the seats out??