Dodge 2000 DURANGO Service Manual page 361

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DESCRIPTION AND OPERATION
HORN SYSTEM. . . . . . . . . . . . . . . . . . . . . . . . . . . 1
HORN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
HORN RELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
HORN SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
DIAGNOSIS AND TESTING
HORN SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DESCRIPTION AND OPERATION
HORN SYSTEM
DESCRIPTION
A dual-note electric horn system is standard facto-
ry-installed equipment on this model. The standard
equipment horn system features one low-note horn
unit and one high-note horn unit. The horn system
uses a non-switched source of battery current so that
the system will remain functional, regardless of the
ignition switch position. The horn system includes
the following components:
• Clockspring
• High-line Central Timer Module (CTM)
• Horns
• Horn relay
• Horn switch
Refer to Clockspring in the Description and Oper-
ation section of Group 8M - Passive Restraint Sys-
tems for more information on this component. Refer
to Central Timer Module in the Description and
Operation section of Group 8E - Instrument Panel
Systems for more information on this component.
Refer to Horn/Cigar Lighter/Power Outlet in the
Contents of Group 8W - Wiring Diagrams for com-
plete circuit diagrams. Following are general descrip-
tions of the remaining major components in the horn
system.
OPERATION
The horn system is activated by a horn switch con-
cealed beneath the driver side airbag module trim
cover in the center of the steering wheel. Depressing
the center of the driver side airbag module trim cover
closes the horn switch. Closing the horn switch acti-
vates the horn relay. The activated horn relay then
switches the battery current needed to energize the
horns.
HORN SYSTEMS
TABLE OF CONTENTS
page
HORN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
REMOVAL AND INSTALLATION
HORN RELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
HORN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Refer to the owner's manual in the vehicle glove
box for more information on the features, use and
operation of the horn system.
CENTRAL TIMER MODULE
The high-line Central Timer Module (CTM) can
also operate the horn system. A high-line CTM is
used on high-line versions of this vehicle. The CTM
combines the functions of a chime/buzzer module, an
intermittent wipe module, an illuminated entry mod-
ule, a remote keyless entry module, and a vehicle
theft security system module in a single unit.
The high-line CTM also controls and integrates
many of the additional electronic functions and fea-
tures included on models with this option. The horn
relay is one of the hard wired outputs of the CTM.
The high-line CTM is programmed to energize or de-
energize the horn relay in response to certain inputs
from the Remote Keyless Entry (RKE) system and/or
the Vehicle Theft Security System (VTSS).
Refer to Central Timer Module in the Descrip-
tion and Operation section of Group 8E - Instrument
Panel Systems for more information on the high-line
CTM. Refer to Remote Keyless Entry System in
the Description and Operation section of Group 8P -
Power Lock Systems for more information on the
RKE system. Refer to Vehicle Theft Security Sys-
tem in the Description and Operation section of
Group 8Q - Vehicle Theft/Security Systems for more
information on the VTSS.
HORN
DESCRIPTION
The dual electromagnetic diaphragm-type horns
are standard equipment on this model. Both horns
are mounted on a single bracket that is secured to
the front of the left vertical member of the radiator
support, just behind the radiator grille and forward
HORN SYSTEMS 8G - 1
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