How to fix the emergency hazard flasher that's frozen and the tail lights don't work

Could be several things. But first make sure that the turn signal flasher is good. It is different than the 4 way/emergency flasher.

What is a hazard switch and where is it located?
The hazard switch allows you to turn on your hazard or emergency flasher lights. When you press the button, all four of your turn signal lights will flash simultaneously. This is a useful way to warn other drivers of potential hazards or to make your vehicle visible during a breakdown, especially at night, and is an important safety feature of any vehicle.

The hazard switch is frequently mounted on the dashboard. Sometimes it is mounted to the steering column or attached to the turn signal switch. The button is marked with one triangle inside another triangle. This part is also commonly referred to as a hazard or emergency flasher switch, hazard or emergency light switch, hazard warning switch, or simply just a flasher switch.

The hazard switch gets power from the horn fuse which is hot all the time, and from the turn signal fuse which is hot when the key switch is on. The turn signal switch gets power from the hazard switch and both use the same flasher.
So if the turn signals work but the hazard switch does not power the lights, and both fuses have power, I would say the problem is inside the hazard switch.

you may have a blown fuse. that would be where i would look first.

you don`t say but do the lights work either on the front/back on both sides.if not then it may be a fuse that needs replacing or need a bulb replacement.if the lights work but don`t flash then it sounds like a signal flasher problem.the flasher is located in the fuse panel under the dash on the drivers side.if the hazard flashers work then turn them on to find the hazard flasher by the fuse panel then you will know what the signal flasher looks like and change the signal flasher.make sure you change the one for the signals and not the hazard one.if the hazards work then i would say the signal switch is good as the hazards work through the same switch.

the hazard lights use a different flasher(relay)then the signal lights.you don`t say if the signals work on one side or not,you should check the fuses for the signal lights in the fuse panel under the dash on the drivers side.if you put the hazards on and find the flasher then you will know what the signal flasher will look like,it is on the fuse panel and replace they should work.

Yes your right the emergency flasher switch is the flasher and located in the middle of the dash and it has a triangle on it with a point up and a ! in the middle. It's dark red in color and when depressed lights up red and flashes ( if it's working like it's supposed to ) If the fuse for hazard is blown the flasker won't work on turn singal either. The fuse for the hazard is hot all the time and the turn fuse is only on with the key. You might find that when you find the button and push i thaqt the turn signals work normally and after you find why the flashers doesn't work on hazard then the hazards will work too.
with the hazard switch poped out of the dash ( it just pries out) it'll have lot's of wires one will be hot all the time and another will become hot when you turn the key on. the other wires go to the turn signal switch. If you find that the switch works fine and it still does flash on turn but it does flash on hazard with it on as a hazard go around and look at all of the lights. They have to work on both the frontand the back and the indicators in the cluster ( speedometer head ) If they all work and are bright ( not dim light the running light) The hazard switch is bad as it's the flasher is made into it.

you need to check the "combination turn signal/hazard flasher/daytime running lights module"
it is located in the junction block,the junction block is adjacent to and left of the steering column,you need to remove the lower dash panel below the steering column,then remove the steel knee brace.

The turn signals use one flasher and emergency uses another one. You can exchange the two (usually) for a quick check. The bad one will move to the other system when swapped, emergency flashers now don't work but the turn signals do. If this is the case go get a new flasher and replace it.

The turn signals don't work, but the emergency flashers do? If that's the case, replace the flasher, you have 2 flashers, one for emergency (hazard) flasher, and one for the turn signals. It should be on the fuse block under the dash.