i have a 2001 volvo v70 xc and the battery finally went dead this weekend. i went and got a battery and changed it out just like i have done on several other cars. this time, something blew and i have no idea of what it could be. everything works on the car except for the the climate control system representing the fan, a/c, and seat heaters. none of the lights even come on. so if anyone has any advice on what that could be, please let me know! thanks!