Dodge ZB 2005 Service Manual page 1649

IGNITION, POWER, ACCESSORY
*HORNS INOPERATIVE —
TEST
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 pigtail connector and ground.
Did the horns sound?
Yes → Repair or replace the wiring/horn switch as necessary.
→ Go To 5
No
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?
Yes → Replace the clockspring.
→ Go To 6
No
6 Disconnect the clockspring C1 connector.
Disconnect the Body Control Module C4 connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the Horn Switch Sense circuit between the clockspring C1
connector and the Body Control Module C4 connector.
Is the resistance below 5.0 ohms?
Yes → Replace the Body Control Module.
→ Repair the Horn Switch Sense circuit for an open.
No
7 Turn the ignition off.
Remove the Horn Relay from the Power Distribution Center.
Substitute the original Horn Relay with a known good relay.
Turn the ignition on.
With the DRBIII actuate the Horn Relay.
Do the Horns operate?
Yes → Replace the original Horn Relay.
→ Go To 8
No
8 Disconnect each horn connector.
With the DRBIII , the actuate the horn relay.
Using a 12-volt test light connected to ground, check for voltage at the Horn Relay
Output circuit at each horn connector.
Does the test light illuminate brightly at both connectors?
Yes → Go To 9
→ Repair the Horn Relay Output circuit for an open.
No
Continued
ACTION
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
268
APPLICABILITY
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All
All
All
All