1 faulty brake light switch, 2 faulty wiring from switch to taillights. Possible short on trailer jack (if fitted).
Are both your brake lights blowing out? If it affects only one light: it could be a bad light socket, or a pinched or frayed wire that is shorting out.
It's because you have a short current somewhere. You need to check the brake light wiring.
short in electrical circuit
It is possible that one of the bulbs is shorting out. Try replacing the brake light bulbs, if that doesn't work, troubleshoot the brake light switch.
Are you blowing fuses or are the bulbs blowing? Blowing fuses would be a sign of any wires or metal contacts in your brake circuit grounding out or shorting on themselves. You'll have to check all of the wiring in your brake light/switch circuit to be sure.
1. a bad ground wire, or 2. a short in the brake electrical system let me know if it helps?
It sounds like you have a short somewhere.
Most likely one or both brake light lamp sockets are corroded. This will short the circuit and blow the fuse. The only other most likely cause is a loose wire connection at the socket or fuse holder.
Brake light switch either out of adjustment or defective Should be located at upper end of brake pedal under dash
Brake lighta computer sensor.It could also be low brake fluid.
It can if it is a dual filament bulb as found on most US. makes. The brake light filament can short over to the tail light filament inside the bulb and when the brakes light is activated, all the tail lights and front marker lights will light also, probably blowing fuses.
Is it the parking brake light or the ABS light? is it red light or amber?
Most likely your pilot light is out
short circuit on trailer light wiring
The brake light switch is under the dash, and whenever the brake pedal is touched the brake light comes on. If the switch has failed or is out of adjustment it will leave the brake light on.
The most probable cause is that the brake light switch is out of adjustment.
A brake fluid leak in the brake system, LOW BRAKE FLUID.
A short in the brake light circuit.
More than likely it is the brake light switch that is attached to the brake pedal.
unplug the neon light and see if that stops it
A defective or out of adjustment brake light switch.
The most likely cause is low-brake fluid.
The " BRAKE ' light in your dash indicates that either your parking brake is on or the BRAKE FLUID LEVEL in the brake master cylinder in your engine compartment IS LOW