Most likely a fuse.
Possible ground issue at the taillights.
Nonfunctional Brake LightsOne possible cause of this issue is that the brake light switch is not adjusted properly, or the switch could be defective.
They are either the wrong bulbs or one of the filaments is burned out. The bulbs should have two filaments. One is illuminated when the lights are on. The other is brighter when the brakes are used.
If the headlights are on and brake lights work but not the tail lights, it is possible there is a short in the electrical wires. Another cause for this could be that the tail light bulbs are burned out. Most vehicles have more than one bulb inside the tail lights to control different lights at the same time.
i was wondering whether the switch at the parking brake could affect this problem.
You should consult the owner's manual, as this appears to be a fuse/electrical issue. You might also consider removing your foot from the brake pedal when driving at night. Happy braking!
A bad ground wire will cause dim headlights, or will cause lights not to work.
I suspect either a faulty ground circuit, or a much easier fix, faulty bulb/bulbs. You might be surprised the havoc a grounded out bulb will cause an electrical system.
Bad ground on the brake lite circuit.
fuse, bulbs
check the bulbs themselves they sometimes short out internaly & cause feedback also check sidemarker lights I have changed all bulbs and fuses! Wiring problem???
brake light switch would be most common cause