It depends on the vehicle but in general you would have one fuse for the signals and one fuse for the brake lights.
Check your fuses. See owner's manual for location and assignment of fuses.
Check the fuses and the bulbs.
Check fuses and bulbs first.
check the fuses.
have you checked your fuses?
There are no extra fuses for your trailer lights. If you have the towing package (and you do) the trailer lights run through your regular fuses (tail, brake, turn).
Check the bulbs - they are doubloe filamented with the smaller being for brake/turn signals Check the fuses
The cruise system shares fuses with the engine and brake lights. If the car runs and the brake lights work, it is not a fuse.
It looks like the brake lights / turn signals have one of the fuses in common : In the fuse panel located under and to the left of the steering wheel , by the brake pedal , FUSE # 13 - 20 amp - for STOP LAMP SWITCH ( LAMPS ) , TURN / HAZARD FLASHER , and speed control module
A blown bulb. Check fuses and then start replacing the bulbs one by one.
The fuses in the 1989 Mercedes 300 control things like the lighting system, the door locks, the wipers, and the instrument gauges. The fuses also control the trunk latch and the turn lights and brake lights.
Check the fuses first then check the bulbs.