ford ba xr8
hope anyone can help i lost power to icc and all dash eg tacho speedo and all startup warning lights stay on
this happened after i wired a 7inch screen top dash to wiring that was already there from power previous from power conection i disconneted the earth wire from battery so wouldnt burn anything out, havent had icc out just loosen it to feed video cable up, any surgestions before take in auto electrians

I had the same problem after wiring an aftermarket headdeck into the rear of the icc, 4 weeks, 2 grand and two senior ford techs later turns out the plug connector at the rear of the icc had intermittent contact with the main power supply. Check the main power supply and that there is sufficient continuity on the wiring pins, would be my best bet Just push a few times on the upper T part of the icc and see if you tacho and speedo kicks back in.