under the dash.drivers side.remove the panel behind the steering coulem .
There is no brake light switch. There is a brake light pressure censor that is located under the cab where the driver's seat is. T.R.
On the brake pedal itself.
It's attached to the brake pedal arm.
Should be to the left of the clutch pedal.
the brake light switch is an air over elec. switch located in an air block on the floor behind steering shaft
Stuck brake light switch, or a short to power somewhere in the brake light circuit.
There's continuous power supplied to the circuit. When the switch contacts, it closes the circuit and allows the power to go to the brake lights.
behind the panel right in front of the throttle pedal
The brake switch on a 2006 Peterbilt 379 is typically located near the brake pedal assembly, mounted on or near the brake pedal itself. It can also be found within the steering column area if it's part of the cruise control system. If you're having difficulty locating it, consulting the vehicle’s service manual can provide a detailed diagram and specific location.
Bad switch, bad wiring, ECM fault. If your jake brakes still work, you can rule out the accelerator position switch. The brake position switch might be reading that the brake is depressed when it isn't.
It's just a weatherpack terminal. Literally a plug and play device.
On a 2007 Peterbilt 379, the park brake switch is typically located on the dashboard near the driver's seat, often integrated with the air brake controls. It may be found alongside other switches for lights and other functions. If you need to access or troubleshoot it, refer to the vehicle's owner's manual for specific diagrams and instructions.