Bad horn unit - check to see if you are getting power to unit Bad horn relay? Blown fuse? Bad horn switch at steering wheel?
lack of water
broken bulb
Windshield wipers are an important safety feature on cars. They stop working when their motor goes out, or when the blade is too worn out.
Bad electrical connections.
It is important to know what causes things to stop working within a car. A blown fuse or bad wiring can cause the key and headlight chime to stop working.
Anything that brings the car to a complete stop? Such as the brakes or a Tree?
Rat poison makes blood stop clotting and stop working.
Switch? Relay?
if only the turn signals are not working,you should replace the flasher can
Check the relay.
seat belt motor is bad
Check the fuse first.