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
On a 1992 Peterbilt, the cruise control pressure switch is typically located on the brake pedal assembly or near the throttle pedal. It is usually mounted on the brake valve or in the vicinity of the cruise control module. To access it, you may need to remove some panels or components in the driver's compartment for better visibility. Always consult the vehicle's service manual for specific details and diagrams.
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.
Stuck brake light switch, or a short to power somewhere in the brake light circuit.
The brake switch on a 1996 Peterbilt 377 is typically located near the brake pedal assembly, mounted on the firewall or under the dashboard. It's connected to the brake pedal mechanism, which activates the switch when the pedal is pressed. For specific details, it’s always best to consult the vehicle's service manual or wiring diagram.
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.