check that you're getting dc voltage to the brake bulb sockets. also, clean out and replace any old electrical grease at the bulb's sockets.
try the multifunction switch located on the steering column .
usually faulty brake lights are either the brake light switch that senses when you press on the brake pedal, a connector somewhere between the brake light switch and the brake lights or the turn signal switch.
Bad bulbs or brake light switch.
Did you replace the fuse? have you checked the circuit board well the lights go on cause they tend to short out often
Have you checked the bulbs themselves? The directional signal should be the same element as the brake light. Check to see if you rear directional signals.
headlight switch
check the bulb again, are BOTH filaments good
Brake switch needs replaced.
Out of adjustment. Adjust the mounting of the switch so the brakes lights are off until you press the brake pedal.
brake light switch bad check for continuity at the fuse then the switch, but yeah bad switch. Kongkit Raggan-Supatanampon
i would heck that you have the correct double element bulbs in your tail light assembly
replace brake light switch on brake pedal if it hasn't been done try that