Check and make sure you have the correct bulb. The turn signal/brake light is a dual element bulb and if you have a single element it does not work properly.
It needs checked out but both the hazard and brake lights go through the turn signal switch.
your brake light switch is probably out
It depends on the exact problem. If it's that both brake lights in the back do not work and the middle one works, it could be your turn signal switch.
Blinkers can work without brake lights. Brake lights are activated by a switch that is switched by the brake petal and the turn signals are acivated by your turn signal switch on your steering column. The two are two separate circuits. I suggest you check out the switch on your brake pedal to see if it is working properly. It must have 12 volts applied to one side when it is not acitvated and 12 volts should be on both sides when it is activated. When the 12 volts is on both sides of the brake switch, it should apply 12 volts to your brake lights and then they should come on.
im not familair with that make of vehicle but. the brake lights anf the signals are supposed to be separte. they both plug into a harness near the back of the vehicle. if your brake lights are working with your signals, you might have something crossed. take it to an expert you trusst and let them check it out.
It' likely, if bulbs are OK that the turn signal switch is burned out. If the switch fails, it won't allow the brake light signal through to the brake light wiring. Go to:http://www.2carpros.com/first_things/no_brake_lights.htm for the 4 page analysis. See: "(American Car) Both Lower Brake Lights Not Working" To determine if the switch is bad test the incoming and outgoing current. If brake light switch power is present at the turn signal switch but not at any outgoing brake light wires, the turn signal switch has probably failed. This is a Buick design issue because keeping your foot on the brake or if the brake switch sticks keeping the brake lights on, the circuit will fail due to amperage overload.
are you sure it is the brake lights and not the tail lights. if it is the brake lights you most likely have a short some where. go to a auto eletrican It is the brake lights which turn on. Short in the switch or the wiring?
There are two elements in some bulbs. One element is for the tun flash, the other is for the brake or taillight. I also failed to mention that they are single element bulbs. It's 1 bulb, single element. It controls both the brake light and the turn signal. The turn signals work fine on both sides but no brake lights when I apply the brake.
There are two filaments in the bulb that is used for taillights and brake lights. Make sure BOTH filaments are good before assuming that the bulb is not burned out. If, in fact, both filaments are good, next check the brake light switch. If it is good, check the turn signal switch that is in the steering column
Although both signal lights and stop lights are within the same lens, they operate on different wiring. The bulb will usually have two filaments, one for stop and one for signal. If the brake lights are not working, the problem is probably a blown fuse or a faulty break light switch.
Either a fuse is blown (which I doubt)both bulbs,blown(which I doubt)or the turn-signal harness that runs through the steeing column.OR the Brake Light Switch that the Brake pedal operates that is under the dash.
Brake light switch near brake pedal