The tail lights are on a separate wiring than the blinker/brake lights. Look for a blown fuse or a broken/loose wire.
Check the fuse for the headlights. It is probably open.
ummm... your brake lights should ALWAYS work whether your headlights are on or not, that's how people behind you know you are stopping.
Check the bulbs they are double filamented with smaller being for brake lights
The brake lights and the tail lights are separate circuits. Check the brake light fuse, then check the brake light bulbs, then check the brake light switch.
Check the switch
Fuse, wiring, bulbs
Most likely a fuse.
Often this type of behavior is caused by a bad ground for the lighting circuit. Check the ground circuit for the brake lights.
check the brakelight switch. it is located under the dash where the brake pedal rests. Hey its ritchie. If you can click your blinker down and then they work its you blinker switch,but this is my monte.
First check the fuse, or you may have a burnt out bulb
the blinker switch shorted out the brake lights... really really common problem, need to replace the switch