HORN RELAY OUTPUT HIGH
For a complete wiring diagram Refer to Section 8W
- When Monitored:
With the ignition on.
- Set Condition:
If the Body Control Module (BCM) detects unwanted voltage on the (X3) Horn Relay Control circuit.
| Possible Causes |
| HORN RELAY SHORTED |
| (X3) HORN RELAY CONTROL CIRCUIT SHORTED |
| BODY CONTROL MODULE (BCM) |
Diagnostic Test
1. VERIFY THAT THE DTC IS ACTIVETurn the ignition on.
With the scan tool, erase BCM DTCs.
With the scan tool, actuate the Horn Relay.
With the scan tool, read BCM DTCs.
Does the scan tool display: HORN RELAY OUTPUT HIGH?
Yes
- Go To 2
No
- The condition that caused this symptom is not currently present. Inspect the related wiring harness for a possible intermittent condition. Look for any chafed, pierced, pinched or partially broken wires.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
2. CHECK FOR A SHORTED HORN RELAY
Turn the ignition off.
Install a substitute Horn Relay in place of the existing relay.
Turn the ignition on.
With the scan tool, erase BCM DTCs.
With the scan tool, actuate the Horn Relay.
With the scan tool, read BCM DTCs.
Does the scan tool display: HORN RELAY OUTPUT HIGH?
Yes
- Go To 3
No
- Replace the original Horn Relay in accordance with the Service Information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
3. CHECK FOR A SHORTED (X3) HORN RELAY CONTROL CIRCUIT
Turn the ignition off.
Remove the substitute Horn Relay from the Junction Block.
Remove the BCM from the Junction Block.
NOTE: Ensure that the Junction Block connectors are reconnected at this time.
Turn the ignition on.
Measure the voltage of the (X3) Horn Relay Control circuit in the Horn Relay connector in the Junction Block.
Is there any voltage present?
Yes
- Replace the Junction Block in accordance with the Service Information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Replace and program the BCM in accordance with the Service Information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).