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 Occupant Classification Sensor
Special Tool(s) Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool Production Occupant Classification System (OCS) System   Item Part Number Description ...