Blown fuse, failed switch, broken wire, burnt out bulbs,
sometimes the head lights and tail lights may be fused separately,check your fuses.you could have a bad ground.thats just two places to start.
it may be your headlight switch, all mentioned circuits are routed through it
Yes.
Bad voltage regulator
The headlights could have bad bulbs or a bad fuse; the two sets of lights are on different circuits.
If you mean the "BRAKE LIGHTS", it could be the switch, the turn signal switch, broken wires or bad connection in the wires or a faulty ground. If you mean the tail lights that come on with the headlights, it could be a bad headlight switch, burned out bulbs, bad wires or connection or a faulty ground.
Check fuse Could be a bad switch
Did you check the lights? They could be dead!
Make sure you have a good ground at sockets Do parking and dash lights work? (same circuit) Check bulbs - double filamented smaller for stop lights and larger for tailights Check sockets may be corroded Could be switch one terminal could be burned out
It could be the fusable link. You might need to search to find it, but look in a haynes or chilton manual or ask a dealer where it is.
The park lamps fuse is blown
If your headlights work, but your tail lights don't, your bulbs could be blown. It is possible that you have a shortage in your car.