HORN SYSTEMS
TABLE OF CONTENTS
page page
DESCRIPTION AND OPERATION
HORN SYSTEM...........................1
DIAGNOSIS AND TESTING
HORN ..................................1
HORN SWITCH...........................2
HORN RELAY ............................2
SYSTEM TEST ...........................2
REMOVAL AND INSTALLATION
HORN ..................................4
HORN SWITCH...........................4
HORN RELAY ............................4
DESCRIPTION AND OPERATION
HORN SYSTEM
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAG, SEE GROUP 8M, RESTRAINT SYSTEMS FOR
STEERING WHEEL OR COLUMN REMOVAL PROCE-
DURES.
DESCRIPTION
The horn circuit consists of a horn switch, horn
relay, and horns.
OPERATION
The horn circuit feed is from the fuse to the horn
relay in the Junction Block. When the horn switch is
depressed, it completes the ground circuit. Then the
horn relay coil closes a set of contacts which allows
current to flow to the horns. Refer to Horn System
Schematic.
DIAGNOSIS AND TESTING
HORN
(1) Disconnect wire connector at each horn.
(2) Using a voltmeter, connect one lead to body
ground and the other lead to the horn relay ouput
pin of the horn connector (Fig. 2).
The right horn is grounded on the front outboard
side of the right frame rail. The left horn is grounded
on the left front fender apron.
(3) When the horn switch is depressed, battery
voltage should be present. Repeat for the other horn.
(4) If no voltage, repair as necessary. If battery
voltage is present, go to next step.
(5) Using an ohmmeter, test the negative terminal
of the connector for continuity to ground. Repeat for
the other horn.
Fig. 1 Horn System Schematic
1 – HORNS
2 – HORN SWITCH
3 – CLOCKSPRING
4 – HORN RELAY
5 – 20 AMP FUSE #8
6 – RIGHT SHOCK TOWER GROUND
HORN CONNECTOR PIN CALL-OUT
PIN # CIRCUIT NAME
1 GROUND
2 HORN RELAY OUTPUT
Fig. 2 Horn Connector Pin Call-Out
LH HORN SYSTEMS 8G - 1
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