This is not good.
With luck, you may have just blow fuses for this. In a lot of cases, control modules are damaged from the voltage surge of hooking up the cables backwards.
You need to replace the battery with a new one to start.
Then you need to test every fuse in the car and replace any failed fuses with new one.
I attached diagrams of the fuse block for you. There is a fuse box under the hood and inside the car.
Images (Click to enlarge)
Sunday, September 13th, 2020 AT 1:55 PM