It's attached to the brake pedal arm.
On the brake pedal itself.
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.
Should be to the left of the clutch pedal.
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.
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.
It's just a weatherpack terminal. Literally a plug and play device.
Short to power in the brake light circuit. Most likely, the fault is in the switch itself.
where is brake light switch
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.
You can try to reset your brake light switch by unplugging the brake light switch and plugging it back in. If that does not solve your problem you will need to replace the brake light switch.
a switch that is trigered to light up the light when the brake pad is pushed in