2000 Chrysler Concorde, completely shutdown while sitting at red light. No power at all, not even hazard lights. any ideas?

I would look in the fuse box or power distribution center for a blown fuse.

The Combination Flasher, also referred to as the combo-flasher, is mounted to the in-line bracket which is located to the right of the Junction Block. The flasher can be removed by pulling in a rearward direction. The left under panel silencer duct must be removed to access the flasher. The combo-flasher is black in color for ease of identification.
The Turn Signal and Hazard Warning Flasher is combined into one unit called a Combination Flasher (Combo-Flasher). The combo-flasher controls the flashing of the hazard warning system and the turn signal system. An inoperative bulb or incomplete turn signal circuit will result in an increase in flasher speed.

Ref: http://www.10w40.com/questions/auto-repair-questions/where-is-the-flasher-relay-on-a-2000-chrysler-concorde
Good Luck

Might have a bad switch behind steering wleel on column.

re-sit the flasher.

I am having the same problem with my 1999 chrysler concorde amoung other problems. But they will work at times and then they will just stop for no reason. Have you found any solutions yet?

this is for a 99 but 2000 should be the same. There might be a red Reset button. Press for about 5 seconds, and release. The Reset button is in the fuse/breaker box under the hood,

Make sure your radiator is completely topped off

check light bulb socket for negative and positive we brake pedal press on

Its a built in alarm. If im not mistaken when you exit you vehicle, push the door lock button from the driver side, clothes all doors, and your lights should flash. If there is no remote for it, turning it off you will have to put the key in the ignition and turn to on.

P0302-cylinder #2 misfire detected
P0420- catalyst efficiency below threshold bank 1
P0340-No cam signal at PCM.
The Cam sensor most likely needs to be replaced first. Clear the codes after that and drive and see what comes back on.