i bought a 90si and it came with a dead 91 si. I put a good battery in the dead one and it has no lights/horn/turn signals/wont start/etc. Someone suggested that i check the ground, i did an it wasn't connected (the one on the valve cover). Now the 4 ways in the back work and the engine turned over (i think?). It makes a horrible metal on metal sound when i try to turn it over. What should i look for? Are all those things on the "mainfuse"? Looking at the fusebox, it has the mainfuse labeled, but i dont see anything removable there. Is it built into the fusebox? I took out the torxhead but nothing comes out. How bout the metal on metal? The guy who i bought the car from said he didn't think anything was wrong with the engine when he parked it. It has full oil. I also tried to roll start it and it made the same bad noise.