Sounds like you may have made an 'accidental connection' when hotwiring. Either shorted or melted a wire, blew a link, etc. Check your grounds real quick, could gave damaged ine. Keep checking, might be wirth starting with where you tied the 12v to to run the power and work backwards to the dash, that is likely where your problem is. You should continue looking for a hotspot or melt, corrosion etc, be VERY through, doesn't take much to be short enough to not start. If still a no-go, do the same with a continuity check, then a manually applied 12v.