Ford Focus Service Manual: Horn

Body Electrical

...

Horn - Description and Operation

NOTE: The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM) . The horn system consists of the following components: Horn switch Horn relay (part of the SJB ) ...

More about Ford Focus:

Ford Focus Changing a fuse
WARNINGS: Do not modify the electrical system of your vehicle in any way. Have repairs to the electrical system and the replacement of relays and high current fuses carried out by properly trained technicians. Switch the ignition and all electrical equipment off before touching or attem ...