Disc Brake problem 72 Swinger

Like lawndart 360 said, I've seen the rubber brake hoses collapse inside. Usually by the time you see any cracking, wear, etc. on the outside, they can already be deteriorated inside. As for the brake lights, they work off of an electrical switch at the brake pedal, and not affected by the hydraulic system. As long as your pedal is coming back up and depressing the plunger on the brake light switch they should go off............unless switch is bad etc.