The central locking on your Focus opens and closes all doors at the same time. To do this, small servomotors are installed in each door lock. Their signals «travel» from both front doors - from the outside it comes from the ignition key and from the inside with the door opening lever. The trunk opens from the inside by pressing a button or the ignition key.
The hood is always unlocked from the outside only with the ignition key. The doors in the Focus with remote unlocking respond to the push of a button. The transmitter is located directly in the ignition key, and the receiver in the interior lighting housing.
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