Diagnostic Test

WARNING: This page is about a different car, the 2009 Dodge Sprinter. However, it is still accessible from the selected car via links, so may be relevant.

TEST FOR INTERMITTENT CONDITION
NOTE: If any other DTCs are present correct those before proceeding with this test.
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. Operate the Horn Switch several times.
4. Cycle the ignition from on to off three times and leave on.
5. With the scan tool, read DTCs.
  Does the scan tool display 9076-HORN CONTROL CIRCUIT LOW?
  
  Yes
  - Go to step 2
  No
  - The conditions that caused this code to set are not present at this time. Using the SYSTEM WIRING DIAGRAMS as a guide, inspect the wiring and connectors.
  - Perform BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Body Control (BCM) - Standard Procedure .
OPEN FUSED B(+) TO RELAY
1. Turn the ignition off.
2. Remove the Horn Relay from the Fuse and Relay Block.
3. Turn the ignition on.
4. Using a 12-Volt test light connected to ground, check the Fused B(+) circuit at the relay connector.
  Does the test light illuminate?
  
  No
  - Repair the open Fused B(+) circuit.
  - Perform BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Body Control (BCM) - Standard Procedure .
  Yes
  - Go to step 3
HORN RELAY
1. Turn the ignition off.
2. Install a known good relay in place of the Horn Relay.
3. Turn the ignition on.
4. With the scan tool, erase DTCs.
5. Operate the Horn Switch several times.
6. Cycle the ignition from on to off three times and leave on.
7. With the scan tool, read DTCs.
  Does the scan tool display 9076-HORN CONTROL CIRCUIT LOW?
  
  No
  - Replace the original Horn Relay in accordance with the Service Information.
  - Perform BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Body Control (BCM) - Standard Procedure .
  Yes
  - Go to step 4
HORN RELAY CONTROL OPEN
1. Turn the ignition off.
2. Measure the resistance of the Horn Relay Control circuit from the relay connector to BCM internal connector.
  Is the resistance below 3.0 ohms?
  
  Yes
  - Replace the Body Control Module (BCM) in accordance with the Service Information.
  - Perform BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Body Control (BCM) - Standard Procedure .
  No
  - Replace the Fuse and Relay Block in accordance with the Service Information.
  - Perform BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Body Control (BCM) - Standard Procedure .