It should be treated as a stop sign.
If the traffic lights are not working, the intersection is treated like a 4-way stop. That is, as if everyone has a stop sign.
Anyone driving a vehicle or riding a bicycle should obey a traffic light.
.... as a stop sign.
If there is a traffic light.
A yellow arrow traffic light means that you should yield in the direction you are going. These are often in place when you are turning left.
You proceed with caution. You don't stop at a blinking yellow light, but you need to keep alert and aware of what is in that intersection.
A flashing red traffic light is used the same way as a stop sign. You treat a flashing red traffic light the same way you do as a stop sign. If the traffic light is "blacked-out", it's to be treated as an all-way stop. What I do when I come up to a flashing red traffic light, I look at the cross-traffic signals to see if they're also flashing red, or if they're flashing yellow to see if they stop or if they don't stop.
look both ways carefully.
Amber (or red) in a traffic light sequence means "stop," put the brakes on! Green means "go;" and yellow signifies that the traffic light is about to turn red (or amber), so you should start to slow down and prepare to stop.
The opposite would be "light traffic".
If a traffic light breaks most cities will assign a traffic cop to regulate traffic until the light can be fixed.
100 fy