95civickilla

So i have a 95 civic with an LS swap so my fuse keeps blowing looks like it is he one from my parking light that is the same from my cluster lights. If i put a 15 amp my cluster loooks so dimmed an as soon as i turn on my parkink lights it blows (with ignition off) after 5-10 seconds maybe less. So i put a 20amp and it dosent blow with ingnition off but if i turn on the car it blows after 5-10 sec maybe less what could it be.