Diagnostic Test

CHECK FOR ACTIVE DTC
NOTE: Before proceeding with this diagnostic procedure, verify the Left and Right Multifunction Switch and Clockspring harness connectors are properly seated and verify proper pin terminal tension. A loose connection at any of these connectors may cause this DTC to set.
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display DTC B2339-HORN SWITCH STUCK?
  
  Yes
  - Go to step 2
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
CHECK FOR SHORTED (X3) HORN SWITCH SENSE CIRCUIT BETWEEN CLOCKSPRING AND CLUSTER
1. Turn the ignition off.
2. Remove the steering column shroud in accordance with the Service Information.
3. Disconnect the Clockspring C2 connector.
4. Turn the ignition on.
5. Using a scan tool, erase DTCs.
6. Cycle the ignition from on to off three times.
7. Turn the ignition on and wait 30 seconds.
8. Using a scan tool, read DTCs.
  Does the scan tool display DTC B2339-HORN SWITCH STUCK?
  
  Yes
  - Go to step 3
  No
  - Go to step 5
CHECK (X3) HORN SWITCH SENSE CIRCUIT FOR A SHORT TO GROUND BETWEEN CLOCKSPRING AND CLUSTER

Fig 1: Measuring Resistance Of Horn Switch Sense Circuit Between Ground & Clockspring C2 Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Cluster C3 connector.
3. Measure the resistance of the (X3) Horn Switch Sense circuit between ground and the Clockspring C2 connector.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (X3) Horn Switch Sense circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Go to step 4
CHECK (X3) HORN SWITCH SENSE CIRCUIT FOR SHORT TO (Y13) RADIO CONTROL RETURN CIRCUIT OR TO (V937) S/C SWITCH GROUND CIRCUIT BETWEEN CLOCKSPRING AND CLUSTER

Fig 2: Measuring Resistance Between Horn Switch Sense Circuits & Radio Control Return Circuit With S/C Switch Ground Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (X3) Horn Switch Sense circuit and the (Y13) Radio Control Return circuit at the Clockspring C2 connector.
2. Measure the resistance between the (X3) Horn Switch Sense circuit and the (V937) S/C Switch Ground circuit at the Clockspring C2 connector.
  Is the resistance below 10K Ohms for either measurement?
  
  Yes
  - Repair all circuits with a resistance below 10K Ohms for a short to the (X3) Horn Switch Sense circuit.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Replace the Cluster in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
CHECK FOR A SHORTED HORN SWITCH

Fig 3: Checking For Shorted Horn Switch
Courtesy of CHRYSLER LLC

WARNING: Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
1. Remove the Driver Airbag in accordance with the Service Information.
2. Disconnect the Horn switch connector.
  NOTE: Before proceeding, thoroughly inspect the wiring harness between the Horn Switch and the Clockspring. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
3. Reconnect the Clockspring C2 connector.
  WARNING: Turn the ignition on, then reconnect the 12-volt battery. Failure to follow these instructions may result in possible serious or fatal injury.
4. Using a scan tool, erase DTCs.
5. Cycle the ignition from on to off three times.
6. Turn the ignition on and wait 30 seconds.
7. Using a scan tool, read DTCs.
  Does the scan tool display DTC B2339-HORN SWITCH STUCK?
  
  Yes
  - Go to step 6
  No
  - Replace the Horn Switch in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
CHECK (X3) HORN SWITCH SENSE CIRCUIT FOR A SHORT TO GROUND BETWEEN HORN SWITCH AND CLOCKSPRING

Fig 4: Measuring Resistance Of Horn Switch Sense Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Clockspring C8 connector.
3. Measure the resistance of the (X3) Horn Switch Sense circuit between ground and the Clockspring C8 connector.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (X3) Horn Switch Sense circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Go to step 7
CHECK (X3) HORN SWITCH SENSE CIRCUIT FOR A SHORT TO (Y13) RADIO CONTROL RETURN CIRCUIT OR TO (V937) S/C SWITCH GROUND CIRCUIT BETWEEN HORN SWITCH AND CLOCKSPRING

Fig 5: Measuring Resistance Between Horn Switch Sense Circuits & Radio Control Return Circuit With S/C Switch Ground Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between (X3) Horn Switch Sense circuit and the (Y13) Radio Control Return circuit at the Clockspring C8 connector.
2. Measure the resistance between (X3) Horn Switch Sense circuit and the (V937) S/C Switch Ground circuit at the Clockspring C8 connector.
  Is the resistance below 10K Ohms for either measurement?
  
  Yes
  - Repair all circuits with a resistance below 10K Ohms for a short to the (X3) Horn Switch Sense circuit.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Replace the Clockspring in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .