Why does hazard lights and stop lights and turn signals no longer work?

The very first thing to check is the flasher unit if nothing comes on or flashes. Then follow the below troubleshooting guide.

Bulb Troubleshooting (check in this order):

· Check Fuses

· Check Bulbs

· Check Relay(s)

· Check Light Switch(es)

· Check license plate light bulb and wiring

· Check trailer hitch wiring harness

· Check all wiring harnesses and wire

Most likely its the fuse or a burnt bulb breaking the circuit. Sometimes the license plate and/or the trailer hitch is wired into other circuits and can cause issues in other areas. Sometimes its wires grounding out somewhere on the vehicle. See sources and related links below for bulb information. See owner's manual for location and identification of fuses as well as for bulb replacement procedures.