Yuo may have a faulty relay, or one or more bulbs are blown.
When both of the turn signals (indicators) of a car blink simultaneously, it is usually because the hazard lights are turned on.
The flasher relay is defective. Replace it.
If both your left and right trailer signals blink at the same time there is something wrong with your wiring harness.
On one side only? The bulb at the rear is blown... Both sides? Both bulbs at the rear are blown, or perhaps a wiring fault?
Bulb is burned out.
one of the lights is not working
you need to replace the turn signil fuse
Answer Usually when the flasher blinks rapidly it's about finished. Try replacing the signal light flasher and see what happens. If you still don't have Brake Lights start looking for a short.
One of the bulbs is burned out. Turn on the blinker and look at the front and back turn signals to find out which one.
check all your bulbs and fuses
The emergency flashers and the signal lights are separate systems. Each has it's own fuse, switch and flasher relay. If your turn signals light up but don't blink I would blame the signal flasher relay.
I replace my flasher fuse.Now they light up but won't blink.