I would check that the switch works. It could be worn out or broken. If it does work, then follow the wires and see if there is a problem with them.
check the fuses for the head lights check the fuses for the head lights
Fuses
The fuses in a Toyota Corolla 2000 are for various components of the car. For instance, the fuses power the windshield wipers, the radio, the power windows, and the power seats.
Horn fuse in located in the fuse box in the motor and the lights are located in the driver side in the bottom on the left side
No fuses are fuses no difference.Take one of yours out and check for size of fuse with unnamed ones from your local auto shop..
It could be caused by a bad ground or severed wire somewhere.
Check the bulbs first, I've seen where both burn out and you can be lead to believe you have an electrical problem.
In a 1993 Corolla the fuses for the taillights are up under the dashboard. Left of the steering wheel. Behind the fold down coin holder, and a REAL pain to get to. One of the very few things I don't like about my Corolla, accessibility of that fuse box
Fuse number 8 Just count from top left like reading a book. It should be a 15A blue fuse. This controls the speedo cluster lights, Tail lights etc. Your head light fuses are in the engine compartment in that fuse box.
Yes one in the engine and the other behind the panel next to the steering wheel (right hand drive) Last mentioned has all the light fuses
check fuses and and all switches one may be bad.also check bulbs behind dash they may be blowed.
Change front light bulbs