Gu rd28 problem...

I have just got my truck running after a new head etc.etc. and at first I thought it was a crook AFM but that doesn't seem to have helped at all.
I tried to read the fault codes by following the instructions I read on this forum but now the dash has gone dead. Must of bridged the wrong connectors. No warning lights, no speedo or tachometer, only the clock and fuel gauge working...and still runs as bad as ever.
Help anyone?

Dash gone dead will be a blown fuse. Fuse 28, It's a 10 amp fuse found in the fuse box inside the vehicle.

you have blown a fuse