B2335-11

B2335-11-HORN CONTROL - CIRCUIT SHORT TO GROUND





For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Body Control Module (BCM) receives the network communication message from the Steering Control Module indicating horn operation is requested. The BCM provides a voltage output through the horn relay control circuit, which connects to the coil side of the Horn Relay.

- When Monitored:
With the Horn active.

- Set Condition:
When the Body Control Module (BCM) detects a low condition on the (X4) Horn Relay Control circuit.





1. INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all DTCs.
3. Apply the Horn switch.
4. With the scan tool, read DTCs.

Does the scan tool display DTC: B2335-11-HORN CONTROL - CIRCUIT SHORT TO GROUND?

Yes

- Go To 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.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK THE (X4) HORN RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND




1. Turn the ignition off.
2. Disconnect the PDC C3 harness connector.
3. Disconnect the BCM A harness connector.
4. Measure the resistance between ground and the (X4) Horn Relay Control circuit.

Is the resistance above 10k Ohms?

Yes

- Go To 3

No

- Repair the short to ground in the (X4) Horn Relay Control circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. CHECK THE BCM FOR CORRECT OPERATION
1. Turn the ignition off.
2. Reconnect the BCM A harness connector.
3. Using a 12-volt test light connected to ground, check the (X4) Horn Relay Control circuit at the PDC C3 harness connector.
4. Turn the ignition on.
5. Apply the Horn switch.

Does the test light illuminate?

Yes

- Replace the PDC.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Body Control Module (BCM). Body Control Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.