try the multifunction switch located on the steering column .
check the bulb again, are BOTH filaments good
The light switch.
The switch was stuck between high and low beams. Just flick the high/low beam switch once and the circut will be back to normal.
headlight switch
the reverse switch in the transmission
brake light switch bad check for continuity at the fuse then the switch, but yeah bad switch. Kongkit Raggan-Supatanampon
It neeeds to be checked out as the printed circuit can have problems. The switch that controls your driving lights ie headlights, turn signals etc. could be bad. Check the fuse first. If it keeps blowing the switch could be shorting out to gnd.
It would help us to know what make, model and year you have.
Very possible ... best to check the wiring with a voltmeter checking for +12vdc.
check the ground on your tailights R.W: Have you checked the turn signal switch? That may have to be replaced.
Did you replace the fuse? have you checked the circuit board well the lights go on cause they tend to short out often
Check bulbs Check fuse Check switch