was fitting my hids in this evening and after reconnecting the battery and try the lights everything went off. the instrument panel done a gauge sweep and where the milege is now just shows several dashes and windows won't work, fuel pump ain't turning on, wont turn over what so ever only thing that works are fogs, radio and interior light and central locking. any idea what fuse or relay would cause all this to stop working. been doing my nut in all night. don't really wanna call an auto electrician out

 

A major failure like this is more likely to be caused by a battery lead forgotten ?
tabetha