Symptom:
*HORNS INOPERATIVE
POSSIBLE CAUSES
HORN GROUND CIRCUIT OPEN
HORN RELAY OUTPUT CIRCUIT OPEN
HORNS
INSTRUMENT CLUSTER
DTC PRESENT
CLOCKSPRING
FRONT CONTROL MODULE
FUSE #45
HORN SWITCH
HORN SWITCH GROUND
HORN SWITCH SENSE OPEN
INTEGRATED POWER MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, read FCM DTC’s.
Does the DRBIIIt display a HORN RELAY CONTROL CIRCUIT DTC active?
All
Yes → Refer to symptom list.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 2
2 With the DRBIIIt, actuate the Horn Relay.
Do the horns operate?
All
Yes → Go To 3
No → Go To 7
3 WARNING: TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND
WAIT TWO MINUTES BEFORE PROCEEDING.
WARNING: DO NOT PLACE AN INTACT UNDEPLOYED AIRBAG FACE
DOWN ON A HARD SURFACE, THE AIRBAG WILL PROPEL INTO THE AIR
IF ACCIDENTALLY DEPLOYED, AND COULD RESULT IN SERIOUS OR
FATAL INJURY.
Gain access to the horn switch.
Measure the resistance of the Horn Switch ground circuit.
Is the resistance below 5.0 ohms?
All
Yes → Go To 4
No → Repair the horn switch ground as necessary.
Perform BODY VERIFICATION TEST - VER 1.
422
IGNITION, POWER, ACCESSORY
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