If your attempting to install a DVD player (in dash) in your car and need to bypass the brake light wire in order to be able to play it while driving its not too difficult. the brake light wire goes hot when the brake is applyied (to power the brake light itself) the DVD player uses this wire to know when the brake light is on or off based on if the wire is "hot" or not. simply splice the wire into a constant power source like the main power wire to your in dash unit.
Bad brake light switch
Brake switch needs replaced.
at the top behind brake pedal, don't remove the lower switch it for the cruise control
ab the above the e-brake peddle
Check to make sure you have power at the brake light switch, if you have power at the switch, depress the brake pedal, and check for power out of the switch, if no power out with the brake pedal depressed, you need a new brake pedal switch.
On the left side of the engine near the brake booster/master cylinder.
you need to replace the brake light button under the brakes inside the car
The switch is located on the foot brake arm. They are difficult to change and I broke mine when putting the new one in. This switch is also the cruise control switch. The switch is adjustable and may only need a few turns of the adjusting nut.
It depends. You may need a new Brake harness. It's an electrical problem you have ti get it looked at.
Trunk and fuel door release?
Brake pad wear sensor. Could be low brake pads or a sensor that is missing or disconnected.
the fuse and the relay should be located in the jb #2 which is right beside the batteryRead more: Where_is_the_relay_or_fuse_for_the_brake_lights_on_a_1998_Catera