For some reason, my tail lights and brake lights are on at the same time. When I do hit the brakes, the brake lights get brighter but when I let off the brake, they all stay on. The parking light and brake light. Usually, half the tail light stays on when the lights are on and when you hit the brake, the other half lights up brighter and when you let off, the one side stays on. I have checked the brake pedal switch and it works fine, I had to replace the parking light fuse because my parking lights wouldnt work. It was replaced with the correct fuse size. Im stuck here, please help...

 

Have you checked the level of brake fluid?

 

Im not speaking of the brake light on the dash inside the truck.......the brake lights on the rear of the truck