fusible links?

well it turns out that i traced the wire from the ignition switch and the privios owner removed the fusible link from the wire and used a wire nut to fasten them together. well the wire nut melted and it shorted out. i put a 40 amp fusible link in it and my accesories now work the engine turns over but wont start. i checked all of my fuses and all but one have power. it is in the number one slot and has an orange and brown wire coming from it. the fuse isnt blown but i dont know what circuit this fuse is for. would anyone else happen to know?