Ford Focus Service Manual: Horn
Body Electrical
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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 )
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More about Ford Focus:
Ford Focus Universal Transmitter - Description and Operation
On early build vehicles, the universal transmitter can be identified by the Homelink®
symbol and one red indicator light.
On late build vehicles, the universal transmitter uses the Lear Car2U® System.
It is identified by the lack of a symbol, but with 3 red indicator lights. Each
of the 3 ...
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