Get a hood prop rod and use that, or be creative.. depress the brake pedal and tie it down with a rope, bungee cord, some boot laces, whatever.
Check fuse, check bulbs, check brake light switch, in that order.
Check the fuse, check the bulbs, check the brake light switch, in that order.
it could be the brake light switch that usually contacts the break pedal when you depress the brake pedal. check that out first.
Check fuses for brake lights. If your brake lights aren't workings the truck will not release the parking pin as it needs the signal from the brake switch on the pedal.
use a test light or a multimeter to check for power at the tail lights, check bulbs.
Panel lights and parking/tail lights should be on 1 circuit Brake lights should be on a separate circuit If you are sure fuses are good- Check bulbs Check headlight switch Check stoplight switch
Check to see if the stop lights are working - shift interlock and brake lights are on the same circuit Check fuses
Check the brake light switch.
Check for a loose connection Check for a loose fuse in the fuse box Check for an open wire in the brake light circuit
Check all the fuses. If not bulbs or switch that's all that it can be,
Check the tail light bulbs. These bulbs do double duty. Thet are both the tail light & the brake light. Tail light part might be burnt out.
Typically, there's a hot switch attached to the pedal which closes the circuit to the brake lights (or to the CECU board in a truck which uses CAN BUS communication).