How do I set the brake light switch? - 1991 Buick Regal

park brake light is come on when parking brake is set position. if light stays on when released the switch is located on the parking brake is defective and needs to be replaced, generally not to difficult to accomplish this replacement

Most brake light circuits are wired through the signal light switch. Are the signal lights yellow or red? Have you checked the brake light switch at the brake pedal?

Possible causes
- Faulty Brake Switch
- Brake Switch harness is open or shorted
- Brake Switch circuit poor electrical connection
What does this mean? When is the code detected?
The P0573 codes is set when the stop light switch signal is too high.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Stop light inoperative
- Cruise control system inoperative
P0573 Description
When the brake pedal is depressed, the stop light switch sends a signal to the Engine Control Module (ECM). When the ECM receives this signal, it cancels the cruise control.

Sounds like you have a shorted ground, some brake systems have a switched ground to control the lights. If your lights are staying on it sounds like the switch wire has a short to chassis ground. Check the wiring around the tail lights area.

brake pedal switch the long part of the switch should touch brake pedal arm.in which turn off brake lights, when press brake pedal this will cause closed circuit and brake lights will turn on.

Move into a position where you can easily see underneath the driver's side of the Ford pickup's dashboard. How you do this depends on your physical size and dexterity.
2

Shine the flashlight on the brake pedal arm to illuminate the stop light switch and the stop light switch mounting bracket. Unplug the Ford pickup's brake light wiring harness from the switch by hand.

Read more: How do I Replace the Stop Light Switch in a 1986 Ford Pickup? ' eHow.com http://www.ehow.com/how_7655525_do-switch-1986-ford-pickup.html#ixzz21tSRtoDU


Unbolt the stop light switch from the stop light switch mounting bracket using the box wrench set. Take the old switch down by hand and place the new switch on the bracket.
4

Bolt the new stop light switch to the bracket with the socket set. Plug the brake light wiring harness into the Ford pickup's new stop light switch by hand.

Your brake pedal switch is bad, causing the brake lights to remain on all the time. Have it replaced.

Pull the brake pedal up as far as you can while someone else watches the brake lights. If the brake lights go out the switch has become out of adjustment. It is located under the dash, above the brake pedal. It is cylindrical in shape and works by a plunger. There are two nuts on it, one on either side of the mount. Loosen the nut toward the pedal (locking nut) and slightly adjust the rear adjusting nut. The lights should be activated when the pedal is depressed about 1/4-3/8 inch.

Climb under the driver's side of the dashboard with a flashlight and box wrench set.

2

Shine the flashlight on the Windstar's brake pedal arm to illuminate the brake switch. Unplug the brake light circuit connector from the brake switch.

3

Unbolt the Windstar's brake switch from its mounting bracket with the box wrench set.

4

Bolt the Windstar's replacement brake switch onto the bracket with the box wrench set.

5

Plug the brake light circuit connector into the brake switch

Read more: How Do I Change the Brake Switch on a 1996 Ford Windstar? ' eHow.com http://www.ehow.com/how_7624548_do-switch-1996-ford-windstar.html#ixzz1CSAaHtlA

Check brake pedal height, and see if pulling up on the pedal gets rid of the brake lights staying on.

Maybe the lines have to be bled to get rid of air in the brake lines.

Or, the rear brakes should be adjusted tighter.

If this is not the problem, maybe adjusting the brake light switch will help.

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ADJUSTMENT Dakota Models

1. Push and hold the brake pedal in the applied position.
2. Push the switch forward until fully seated against the bracket.
3. Release the brake pedal.
4. Lightly pull the brake pedal rearward until the master cylinder pushrod bottoms against its internal stop. The switch plunger is now set at its proper clearance.

1989-93 Pick-Up and Ramcharger Models WITHOUT SPEED CONTROL

1. Loosen the switch-to-pedal bracket screw and slide the switch away from the pedal arm.
2. Push the pedal down by hand and allow it to return on its own to the free-hanging position. Do not pull it back! Fig. 1: Brake light switch adjustment specifications - 1989-93 models
   
   
3. Slide the switch towards the pedal until there is a gap of 0.140 in. (3.5mm) between the plunger and pedal arm. NOTE: The pedal must not move when measuring the gap.
   
4. Tighten the switch screw to 82 inch lbs. (9 Nm). Recheck the gap.

WITH SPEED CONTROL

1. Push the switch through the clip in the mounting bracket until it is seated against the bracket. The pedal will move forward slightly.
2. Gently pull back on the pedal as far as it will go. The switch will ratchet backwards to the correct position.

1994-96 Pick-Up Models This procedure calls for setting the switch prior to installation. Installation directions are included in this one procedure.

1. Preset the switch in the following manner:
   1. Pull the switch plunger all the way out until it is fully extended.
   2. Push the switch plunger inward 4 detent positions (clicks). This will provide the preset position for the switch installation. The plunger will extend approximately 0.55 in. (14mm) out of the housing at this setting.
2. Connect the harness wires to the switch.
3. Press and hold down the brake pedal.
4. Install the switch. Align the tab with the notch, then insert the switch and turn clockwise about 30°to lock it in place. WARNING
   Do not use excessive force when setting the brake pedal switch or damage to the switch could result.
   
5. Release the brake pedal, then LIGHTLY pull the pedal fully rearward. The pedal will set the switch to the correct depth.