Hello ladies and gentlemen! First off thanks for the help/suggestions. Ok so i have a 1990 Chevy Silverado 350 v8. My problem is that my brake running lights work but when i press down on the brake pedal the lights don't get brighter like they're supposed too, and to add on top of that my blinkers wont work. Left or right. They don't even act like i turned them on, inside the cab where the arrows are supposed to light up and make the infamous clicking noise. None of it happens.... Fuses are good but the fuses that were in the spots were a 25 fuse and the box says it needs a 15A fuse. Could this of caused a problem? Any info would be appreciated. Thanks!

 

The brake lights only go on when you press the brake pedal. So yours are not working at all. The first thing to check, since you already checked the fuses is the bulbs themselves.

 

The bulbs are all good to go they ligh up when i put my running lights on its just when i press down on the brake pedal they dont get brighter like they're suspost too.

 

The bulbs are double filament bulbs. One comes on for the lights and the other comes on for the brake light, so they can still be bad even if they do light up.