i have been doing some research on power window, sunroof and door locks not working and i guess this is a pretty common issue on a 1992 325i, i really need some help or guidance please, my windows nor sunroof have power or work and i checked relays and fuses. i don't know what module to check or where it is located. i have researched most of these problems are due to bad modules, any help would be greatly appreciated, thank you.