Diagnosis And Testing - Horn System
WARNING: This page is about a different car, the 2016 Dodge Journey and 2015 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact sensor or instrument panel component diagnosis or service. Refer to WARNING . Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the SRS. Failure to take the proper precautions could result in accidental airbag deployment.
NOTE:
A continuously sounding horn is immediately resolved by removing the horn fuse from the Power Distribution Center (PDC).
| HORN SYSTEM DIAGNOSIS | ||
|---|---|---|
| CONDITION | POSSIBLE CAUSES | CORRECTION |
| HORNS SOUND CONTINUOUSLY | 1. Ineffective horn feed circuit. | 1. Test and repair shorted horn feed circuit if required. |
| 2. Ineffective horn switch return circuit. | 2. Test and repair shorted horn switch return circuit if required. | |
| 3. Ineffective horn relay. | 3. Test and replace the horn relay, which is integral to the Power Distribution Center (PDC), if required. | |
| 4. Ineffective horn switch. | 4. Test and replace the shorted horn switch (Driver AirBag/DAB) if required. | |
| 5. Ineffective Body Control Module (BCM) inputs or outputs. | 5. Use a diagnostic scan tool to test the BCM inputs and outputs. Refer to the appropriate diagnostic information. | |
| HORNS SOUND INTERMITTENTLY AS THE STEERING WHEEL IS ROTATED | 1. Ineffective horn switch return circuit. | 1. Test and repair intermittently shorted horn switch return circuit if required. |
| 2. Ineffective horn switch. | 2. Test and replace the intermittently open or shorted horn switch (Driver AirBag/DAB) if required. | |
| HORNS DO NOT SOUND | 1. Ineffective horn ground circuit. | 1. Test and repair open horn ground circuit if required. |
| 2. Ineffective horn fuse. | 2. Test and replace the horn fuse in the Power Distribution Center (PDC) if required. | |
| 3. Ineffective horn feed circuit. | 3. Test and repair open horn feed circuit if required. | |
| 4. Ineffective horn relay. | 4. Test and replace the horn relay, which is integral to the Power Distribution Center (PDC), if required. | |
| 5. Ineffective horns. | 5. Test and replace open horns if required. | |
| 6. Ineffective horn switch feed circuit. | 6. Test and repair open horn switch feed circuit if required. | |
| 7. Ineffective horn switch return circuit. | 7. Test and repair open horn switch return circuit if required. | |
| 8. Ineffective horn switch. | 8. Test and replace the open horn switch (Driver AirBag/DAB) if required. | |
| 9. Ineffective BCM inputs or outputs. | 9. Use a diagnostic scan tool to test the BCM inputs and outputs. Refer to the appropriate diagnostic information. | |