Blade Type ATO/ATC Automotive Fuses: 10A for the turn signal lamps & 15A for the Brake/Hazard Lamps. Hope that helps.
check your fuses and the brake light switch above the pedal
Check the fuses for your brakes.
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.
Try checking the tail light relay.
It needs checked out but both the hazard and brake lights go through the turn signal switch.
Check the fuses.
The brake lights and signal lights are tied together in the signal switch, also known as the "multifunction switch".
if the plug is receiving power but the lights wonbt come on you may have to replace the entire lens piece since the brake lights are not a normal bulb they are built into the lens
Probably the flasher unit needs to be replaced. This is an electronic switch which usually mounts underneath the dashboard.
If the fuses and bulbs are okay I would blame the signal switch assembly. They call it a multi-function switch these days.
The hazard switch and the turn signal and brake lights are all incorparated, chances are the 3-1 switch is broke internally check all fuses
Try your fuses