help me please!

[chevykid1969]

I cut my truck off today and walked away. then my mom said that my back lights were on(brake lights) so i went out to take a look and sure enough the brake light are on. it is so wierd. when the truck is off the brake lights stay on and when you play with the blinker switch they turn off( turn left left goes off-turn right the right goes off.) now when the truck is on the brakelights stay on and when i push in the brake they dont do anything. but the blinkers work . sorry if this does not make any since but the only way i can make the braklights go off is to take out the fuse. Anybody got any ideas.

Thanks

Eric