TEST ACTION APPLICABILITY
4 WARNING: TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND
WAIT TWO MINUTES BEFORE PROCEEDING.
CAUTION: 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 connector.
WARNING: TURN THE IGNITION ON, THEN RECONNECT THE BATTERY.
Momentarily connect a jumper wire between the Horn Switch Sense circuit at the
Horn switch connector and ground.
Did the horns sound?
All
Yes → Replace the horn switch.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 5
5 Disconnect the clockspring C1 connector.
Momentarily connect a jumper wire between the Horn Switch Sense circuit at the
clockspring connector and ground.
Did the horns sound?
All
Yes → Replace the clockspring.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 6
6 Disconnect the clockspring C1 connector.
Disconnect the Instrument Cluster C3 connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the Horn Switch Sense circuit between the clockspring C1
connector and the Instrument Cluster C3 connector.
Is the resistance below 5.0 ohms?
All
Yes → Replace the Instrument Cluster in accordance with the service
information.
Perform BODY VERIFICATION TEST - VER 1.
No → Repair the Horn Switch Sense circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
7 Turn the ignition off.
Check fuse #45 in the IPM.
Is the fuse open?
All
Yes → Replace the fuse. Check for a short to ground in the Horn Relay
Output circuit from the IPM to the horns.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 8
8 Disconnect a horn connector.
With the DRBIIIt, actuate the Horn Relay.
Using a 12-volt test light connected to ground, check the Horn Relay Output circuit.
Does the test light illuminate brightly?
All
Yes → Go To 9
No → Go To 10
423
IGNITION, POWER, ACCESSORY
*HORNS INOPERATIVE — Continued
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