the microswitch is self adjusting and may be pushed in too far so not turning the lights off
remove the switch from the car
undo the switch case remove the plunger and
pull it each end click click to make it longer
refit plunger in case put switch back together
dont push the plunger at all
press brake pedal down keep it pressed down
refit the switch to the car
release the brake pedal and you should hear the swith
click click as it adjusts the plunger to the right length
check the operation of the brake lights
job done
Defective brake light switch.
Check the fuses, check the brake light switch, check the bulbs.
You may need to check your brake light switch. It is a small switch located on top of your brake peddle (up on the arm of the peddle). This switch allows the brake lights to come on whenever you push the peddle.
check that you have double filament bulbs in tail lights
check wire continuity- no power no lights
It's the brake switch. It tells your break lights to come on.
There should be a switch on top of your steering column that turns on/off the "Parking Lights". Check to see if that is your problem. The switch should show red on the front of it if the lights are on.
Behind steering wheel is a set of contacts that disable the brake lights when a turn signal is on, they may be stuck in the off brake light position. Try pushing the turnsignal arm to its limit and then wiggle it....careful you do not brake it off. Also check for brake light switch adjustment.
Either all brake light bulbs are bad, and yes it is common for all the bulbs to fail with in a day or two. Or the signal light switch has an internal problem.
Although there could be other causes, I suspect that the problem is related to the brake light electrical circuit since you replaced the lamps and fuse [assuming they were all good]. The most common cause of symptoms that you describe suggest that the brake light switch may be involved, either not adjusted properly, or defective. Though not familiar with your vehicle, MOST brake light switches are mounted on or near the steering column, and above the brake pedal arm, in contact with and depressing the switch's plunger [thus holding the switch OPEN], and when the pedal is depressed, allows the switch plunger to extend, closing the switch, allowing electrical current to the circuit and thus the brake lights. This type of switch is genrally mounted by screwing a threaded nipple on the switch into a threaded hole in a mounting bracket. This switch is adjusted by screwing the switch further out or in. A small percentage of vehicles use a hydraulic type switch mounted into a hole on the brake master cylinder on the firewall in the engine compartment. To my knowledge, these switches are not adjustable. Good luck.
its still the switch,it isn't adjusted correctly
possible turn signal switch failure common on gm cars