Nissan Tiida 2008 Sedan, manual 270 miles
One moment I was driving fine and all of a sudden my gearbox mountain broke and I had it welded, unfortunately the welding rod touchithe computer box as the welder was taking it out, but battery was disconnected. When I tried staring the car it gives a funny sound , doesn't start is just malfunctioning, wipers just go on by themselves, boot opens on its own and hazards are flashing non stop. I took my computer box to technicians and they checked it and say nothing is wrong with it, but my car is still malfunctioning 🤷🤷, what could be the problem?