ingnition problems

I need help with a short that crosses over threw the ignition and the brake i turn the key on to listen to the music and push the brake and then the car will turn over and start i rreplaced the ingnition and after that it started to do that can u help

the kind of car and year would get u more help
but I assume its a firebird

maybe they gave u the wrong switch

i assume it didnt do this before u replaced the switch right