fuses

I have a 56 reg Astra SXI (105) and am having a few problems when trying to lock it. Last night when I turned off the engine, the radio stayed on.. I turned that off and opened the driver door only to have the door open alarm start binging (the one that sounds if you leave the lights etc. on...

My glowplug light doesn't come on at all even when I turn the ignition I was wondering if it could be a fuse problem or circuit braker problem the problem is I don't know where the fuse/breaker is can anyone tell me please ??