Dodge Dakota (ND). Manual — part 257
HORN SYSTEM - SERVICE INFORMATION
TABLE OF CONTENTS
page
page
HORN SYSTEM - SERVICE INFORMATION
. . . . . . . . . . . . . . . . . . . . . . . . . 14
. . . . . . . . . . . . . . . . . . . . . . . . . . . 14
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HORN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
. . . . . . . . . . . . . . . . . . . . . . . . . 16
SWITCH-HORN
. . . . . . . . . . . . . . . . . . . . . . . . . 16
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HORN SYSTEM - SERVICE INFORMATION
DESCRIPTION
The dual-note horn system features two electromag-
netic horn units. The horn system includes the follow-
ing major components:
•
Horn - The two horns are located on the left side
of the engine compartment near the battery.
•
Horn Switch - The horn switch is molded into
the driver airbag trim cover.
OPERATION
The horn system operates on battery current received through a fuse in the Integrated Power Module (IPM). The
horn system circuit is designed so that the system will remain operational, regardless of the ignition switch position.
DIAGNOSIS AND TESTING
HORN SYSTEM
The most reliable, efficient, and accurate means to diagnose the horn system requires the use of a scan
tool and the proper Diagnostic Procedures information.
Refer to the appropriate wiring information.
In most cases, any problem involving continually sounding horns can be quickly alleviated by removing the horn
fuse from the Integrated Power Module (IPM).
8H - 14
HORN SYSTEM - SERVICE INFORMATION
ND
WARNING: DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, SEAT BELT TENSIONER, SIDE AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MIN-
UTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNO-
SIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE
THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
HORN
DIAGNOSIS AND TESTING
HORN
The most reliable, efficient, and accurate means to diagnose the horn system requires the use of a scan
tool and the proper Diagnostic Procedures information.
Refer to the appropriate wiring information.
WARNING: DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, SEAT BELT TENSIONER, SIDE AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MIN-
UTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNO-
SIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE
THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
REMOVAL
1. Disconnect and isolate the battery negative cable.
2. Remove the horn mounting fasteners.
3. Disconnect the electrical harness connector and
remove the horns.
ND
HORN SYSTEM - SERVICE INFORMATION
8H - 15
INSTALLATION
1. Connect the electrical harness connector to the
horns.
2. Position
horns
and
install
mounting
fastener.
Tighten fastener.
3. Connect battery negative cable.
SWITCH-HORN
DESCRIPTION
The horn switch is molded into the driver airbag cover. The horn switch can not be serviced separately (Refer to 8
- ELECTRICAL/RESTRAINTS/DRIVER AIRBAG - DESCRIPTION).
DIAGNOSIS AND TESTING
HORN SWITCH
The most reliable, efficient, and accurate means to diagnose the horn system requires the use of a scan
tool and the proper Diagnostic Procedures information.
For complete circuit diagrams, refer to the appropriate wiring information.
WARNING: DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, SEAT BELT TENSIONER, SIDE AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MIN-
UTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNO-
SIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE
THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
8H - 16
HORN SYSTEM - SERVICE INFORMATION
ND
IGNITION CONTROL
TABLE OF CONTENTS
page
page
DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
IGNITION SYSTEM - SERVICE INFORMATION. . . . 5
IGNITION SYSTEM - ELECTRICAL DIAGNOSTICS
TABLE OF CONTENTS
page
IGNITION SYSTEM - ELECTRICAL
DIAGNOSTICS
DIAGNOSIS AND TESTING
B2100-IGNITION RUN/START INPUT
CIRCUIT PERFORMANCE . . . . . . . . . . . . . . . . 2
IGNITION SYSTEM - ELECTRICAL DIAGNOSTICS
DIAGNOSIS AND TESTING
ND
IGNITION CONTROL
8I - 1
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