First, remove the bulbs. Second, replace the fuse. If the fuse still blows it's a wiring problem. The fuse is doing it's job by not allowing the short to burn up the car.
The most common reason is a bulb failure. If the bulb is known working, or replacing the bulb does not cure the problem, look to the fuse, switch and wiring.
Try chamging the bulb, and if that doesnt solve your problem, check all the wiring.
the fuse should be for all brake lights and tail lights if only one is out its a bulb
Check the bulb.
A bad brake light switch or a bad headlight switch, or the power source of the fuse has a problem or break in the wire (circuit).
If the bulb will not work the fuses under the dash should be checked. When these fuse fail the brake lights will not turn on.
The brake relay switch is bad.
Probably a blown fuse.
Fuse for parking lights probably blown.
The brakelight switch, wiring, bulb holder(s) or bulb is shorting out.
it has a bulb unless your gauge lights are out too then it is a brake fuse that's what i found to be the problem
1. Burned out bulb. Easiest to fix / find. OR 2. Fuse blown. OR 3. Trailer Fuse blown (yes it effects the tail / brake lights) OR 4. Ground wire not grounding. Hardest to fix / find.