ilike2drive21

So my old chassis harness burnt out due to an alarm it had and i sourced sohc hatch harness, i ended up fitting it in my dohc coupe. Everything works and the car turns on except for 2 problems.

1) after turning the car once i switch the key back to accessories position the car will still stay on except its not drivable but more like just a rough idle.
2) the radio speakers only work when the car is in accessories position but when i turn the car on the speakers dont work at all.

Any suggestions or should i just end up getting another harness.