If your vehicle is showing turn signal clicking sound is missing, here are the most likely causes and the parts you'll need to fix each one.
In many vehicles, the clicking sound is physically produced by the mechanical flasher relay opening and closing. When this relay fails, the sound stops and the turn signals usually stop flashing.
A blown fuse cuts electrical power to the entire turn signal circuit. Without power, the relay cannot operate to produce the clicking sound or flash the lights.
Installing aftermarket LED turn signal bulbs without adding a load resistor alters the circuit's electrical resistance. This can cause the factory mechanical relay to stop clicking, hyperflash, or freeze.
The turn signal stalk on the steering column can wear out internally. If its internal contacts fail, it won't send the activation signal to the relay or control module.
In modern vehicles, the clicking sound is not mechanical; it is synthesized through a small speaker controlled by the Body Control Module. If this speaker fails, the exterior lights will still flash but the cabin will be silent.