B2300 L4-2.3L (2008)
Horn: Description and Operation
HORN
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 (part of the steering wheel)
-
Steering wheel switch harness (part of the steering wheel)
-
Clockspring
-
Horn relay (part of the [SJB/GEM])
-
Horn
For the removal and installation of the steering wheel, see STEERING WHEEL.
For the removal and installation of the SJB, see SMART JUNCTION BOX (SJB). See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service
and Repair
Horn Location
The horn is mounted on the RH side of the core support behind the radiator grille.
HORN
See Mazda wiring diagrams.
Principles of Operation
The horn switch is incorporated within the steering wheel. When the switch is closed, ground is supplied through the clockspring from the vehicle
harness. The horn relay is then energized, supplying voltage to the horn enabling the horn to sound. The horn relay is integral to the smart junction box
(SJB).