Since I/ we really don't know what you did/ caused, or what the problem is, DO THIS
1...Disconnect the batter ground cable
2....Start troubleshooting by leaving the cluster OUT but take a small machine screw and nut and bolt the ammeter connections (the large red and large black, both with eyelet terminals) together and TAPE
3...Next protect the harness wiring by taking a large wattage 12V lamp, such as either an old but working head lamp or a stop/ tail lamp and wire that lamp in SERIES between the battery neg post and the ground cable. Alligator/ battery charger clips are a help, here
4....Now, with this bulb in series, a short or other large current will not blow fuses, nor burn up wiring.
5....Now start by determining if the ammeter circuit--which is supplied by the red from the battery, through the fuse link, and through the bulkhead connector--determine if that is live, and see if say, the park or dome lights work. Something which draws a small amount of current, such as the dome light, should light almost as bright as normal through your protective ground lamp. The headlights will not. They may glow a bit, and they will likely cause your ground protection lamp to light brightly.
The starter will not work, but if you disconnect the "square screw" terminal at the starter relay, you should be able to twist the key to start, and hear the starter relay click.
Then go from there.
IF YOU caused this short AND IF you are lucking and did not blow out the fuse link, then remove the series ground lamp and see if it will crank, start, etc, and see what else works.
