Hi , My engin oil light stay ON when I turn the engin off. When I turn the switch to ON then it almost turned off with a small light showing.

What I did recently is installing a radio, and connected the memory wire of the radio to a wire under the dash that was 12v all the time. This cause my engin to run very poor, then car light start flashing and big noice, I burned a 30A fuse on the main line from battery to the relay. So I disconnect the radio and now the Oile light is ON all the time. Any help appriciated.