Brake lights come on randomly

HUSKERJ

MEMBER
1995 FORD F-150
4.9L
6 CYL
4WD
AUTOMATIC
160,000 MILES

With the engine off and key not in ignition, my brake lights sometimes turn on. They may go off again by themselves, or not. I can move the brake pedal by hand and that shuts them off. Obviously having them come on when I'm not around drains the battery. Is this caused by a faulty brake pedal switch issue or something else? Where should I start looking? Thanks.

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi,

Is there excessive play in the brake pedal? If not, then I would recommend replacing the brake light switch. However, make sure the switch is tight and properly installed before replacing it.

Here are directions for replacement. The attached pic below correlates with the directions.

_____________________________________

1995 Ford Truck F 150 2WD Pickup L6-300 4.9L
Procedures
Vehicle Sensors and Switches Sensors and Switches - Lighting and Horns Brake Light Switch Service and Repair Procedures
PROCEDURES
REMOVAL AND INSTALLATION
1. Disconnect battery ground cable.

Fig. 3 Stop Light Switch Replacement

see pic 1

2. Lift locking tab, then disconnect electrical connector from switch.

3. Remove hairpin retainer, then slide stop light switch, pushrod, nylon washers and bushings away from pedal and remove the switch from vehicle.
4. Reverse procedure to install.

NOTE: Ensure stop light switch wires are of sufficient length to allow full travel of the brake pedal.

____________________________

Let me know if this helps or if you have other questions.

Take care and God Bless,

Joe

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Tuesday, March 2nd, 2021 AT 9:00 PM

HUSKERJ

MEMBER
2 POSTS

Thanks, Joe. I don't believe there is excessive play in the pedal. I suspect the return spring in the switch may be at fault and your suggestion to replace the switch seems to make the most sense. Thanks again.

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Wednesday, March 3rd, 2021 AT 4:31 PM

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi,

You are very welcome. If you have a chance, let me know if that takes care of the problem for you. It will likely help others in the future.

Also, please feel free to come back anytime in the future if you have questions. You're always welcome here.

Take care,

Joe

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Wednesday, March 3rd, 2021 AT 5:19 PM