Why does the fuse for the rear driving lights & dash light immediately pop?

What is your question?

A few wks ago out of nowhere our rear driving lights & dash light just died. No reason,No warning. My bf & I have replaced the fuse several times. It calls for a 10amp. We've tried several 10 & 15amp fuses. Each 1 pops immediately every time as soon as we turn the key in the ignition. The headlights & brake lights still work fine. But we have no dash or rear driving lights. We'd like to remedy this problem ourselves, so we'd greatly appreciate any detailed ideas on how 2 isolate & remedy this problem. Thanks.