Most likely turn signal flasher
Most likely poor wiring.
Check fuses? Could be a bad headlight switch/ Could be an open in dimmer rheostat?
Loose connections or worn parts in the light switch.
The whole turn signal arm unit needs to be replaced
You may have a bulb that that brunt a element which than crossed the other element cause all lights to come on a one time. I have seen this before. If this does not light all bulbs when the brakes are applied, then I would be looking in the front lights, if it does I would look in the back lights.
Bad turn signal flasher.
The lights wiring is grounded and you might want to check to see if the ground is connected properly to the frame.
That would depend on what warning lights you are referring to. I'll need more information if I am to answer this fully.
I have a 2000 olds alero and the signal light only work sometimes, What would cause that?
multi switch is bad