What happens when you get into a car accident and the traffic signal lights werent working?

If you can prove that the lights were not working at the time of the collision, the "owner" may also have some liability IF it contributed to the cause of the collision. In CA when the lights are not working it becomes a "stop sign" and drivers are required to stop until safe to cross. by way of example if the driver did not stop and was involved involved in a crash as a result... there may not be much liability on the signal "owner" This is where hiring a collision reconstructionist such as myself may be helpful to review your case and help you determine your options