9000 - 9999: 9075

9075-HORN CONTROL CIRCUIT HIGH - BCM





For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
Continuously.

- Set Condition:
When the BCM senses an over current on the relay control circuit.





Diagnostic Test

1. ERASE AND ATTEMPT TO RESET DTC'S
Turn the ignition on.
With the scan tool, record and erase the current Body Control Module DTC's.
Turn the ignition off, wait 10 seconds then turn the ignition on.
Attempt to operate the horn.
With the scan tool, read the current Body Control Module DTC's.
Does the scan tool display: 9075-HORN CONTROL CIRCUIT HIGH?

Yes

- Go To2

No

- The condition that caused this symptom is currently not present. Inspect the related wiring harness for a possible intermittent condition.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests

2. INSTALL KNOWN GOOD RELAY
Turn the ignition off.
Remove the Horn Relay from the Fuse and Relay Block.
Substitute the original Horn Relay with a known good relay.
Turn the ignition on.
With the scan tool, erase the current Body Control Module DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Attempt to operate the horn.
With the scan tool, read the current Body Control Module DTC's.
Does the scan tool display: 9075-HORN CONTROL CIRCUIT HIGH?

Yes

- Go To3

No

- Replace the original Horn Relay.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests

3. HORN RELAY CONTROL CIRCUIT
Turn the ignition off.
Disconnect the Body Control Module from the Fuse and Relay Block.
Remove the Horn Relay from the Fuse and Relay Block.
Turn the ignition On.
Measure the voltage of the Horn Relay Control circuit at the relay.
Is the voltage above 1.0 volts?

Yes

- Replace the Fuse and Relay Block.
- Perform BODY VERIFICATION TEST - VER 1.Verification Tests

No

- Replace the Body Control Module.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests