why did my car cigar ligher stop wroking

I would first try replacing the fuses to those. That is usually the number one problem with those. You should have a fuse box located under the steering wheel down by the pedals. They are usually numbered and labeled and you can see if yours is broken by pulling it out and looking at it. It will look like the inside of a broken light bulb if it is. They if it is isn't write back.