1990 Isuzu Trooper day time running lights short

When I push on the brakes the dash lights come on,the warning light never goes out,the day time running lights don't work and when ever I hook up my utility trailer lights it blows the turn signal lights fuse.
I put a new stereo in my Trooper,the warning light went out,the day time running lights worked and the dash stopped lighting up when I pushed the brakes but this only lasted till I shut off the ignition and when I started it up again then everything started back the way it was.

Anyone know where in the heck the short may be comming from???

Well the daytime running lights problem was that the emergency brake was not making contact with the switch when it was pushed in so I unstuck the switch and the day time running lights work just fine and the warning light does not come on anymore.
The short that was causing my dash to light up when I pushed the brakes was because there was a single filement light in the socket where a double filement bulb was to go on the drivers side tail light assembly,so short was descovered and problem solved,I suspect that my turn signal fuse will stop blowing from the added amperage from my utility trailer lights being hooked up but I will soon see.
Cheers!