Check the bulbs they are double filamented with the smaller for stop and turn signals
The most common reason that your dash lights and taillights are not working on your Pontiac Grand Am is blown fuses. Replace the fuses.
i would try changing your bulb in the rear of the car first then if it still not working then look for fuse or wiring problem
Sounds like bulbs need to be replaced--they most likely are double filamented-larger filament for tail lights and smaller for brake lights be a broken wire or a bad ground Depends on the car....most use 2 different circuits the top light going straight to the brake pedale switch and the tailights going through a control module THEN to the tailights. Check EVERY fuse you have in the car
you may want to make sure you have a DUAL(meaning TWO pieces of wire inside the bulb) filament bulb on the brake lights, if you just replaced the bulb and used a MONO filament bulb it will cause this to happen. If this isn't the case, you may want to take it to a mechanic to make sure the sensor that senses when you are pushing the pedal isn't stuck or out that would also cause the same problem.
Adjust the brake switch located on either the brake lever itself, or it will be attached underneath the dash. SOunds like your brake switch is off or broken. Look at the brake pedal and there is a switch around it that gets activated by you pushing the pedal - that is what needs to be adjusted or replaced. The brake light switch has probably come loose or broken. Look under the dash near the brake pedal arm. There is a switch attached to a bracket.
Brake Lights Don't WorkThere could be several causes for this problem, and without being able to see and troubleshoot the brake light wiring circuit no one can tell you the specific cause.Some of the possible causes include:Brake light switch is not adjusted properly.The fuse for that circuit is "blown" out.A wiring harness connector anywhere in that circuit has become unplugged, or loose.The ground wire or wires for that circuit have become disconnected, or the connection of the ground wires to the vehicle's grounded body sheet metal has been blocked by corrosion.A wire in the circuit has been cut, broken, or pulled loose.The brake light switch has become defective.There are probably a few other causes I have forgotten about.
It depends on the vehicle but in general you would have one fuse for the signals and one fuse for the brake lights.
I have a 1996 Grand Marquis. If one of the brake lights goes out the signal on that side flashes faster. I would check the brake/tail lamps.
change the fuse if not replace flasher
if turn signals are working , and brake lights not working, i would replace the stop light switch on the brake pedal
Check the bulbs - they are doubloe filamented with the smaller being for brake/turn signals Check the fuses
have you checked your fuses?
The only thing common to all those lights (but not to the center brake light) is the hazard switch. I'd check that next. On my 96 Century the hazards override the signals and brake lights meaning that the signals and brake lights must be wired into the hazard switch somehow.
Check your fuses. See owner's manual for location and assignment of fuses.
sounds like you need new taillight bulbs
Brake lights often use a dual-filament bulb. If this gets inserted the wrong way other functions can suffer.
No brake lights but turn signals work? Turn signal switch brakes route through it.
I am having the same trouble. My brake lights work with the light switch for nighttime driving, but only far right brake light works when i pres brake pedal. Reverse lights dont work at all. Turn signals and hazard light work.