i tried to jump start my car after an engine swap cause the battery was dead, and when i went to put the jumper cables on i arked the two. i didnt hear anything pop like a fuse i just heard the sparks. now i dont have any power to the car it seems. the only thing that has power are the lights. it is getting power to the starter cause i used a jumper wire and it cranked the engine but it didnt start. the cd player doesnt even turn on. no heater controls. i checked all the fuses and they were all ok. the only thing i can think of is amybe i blew a main relay or something. if anyone can help please let me know. thanks

try letting it recharges a little before cranking it again...its probably really flat. Better still change the batt.