Circuit/System Verification
WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition » On / Vehicle » In Service Mode
- S33 Horn Switch»Not Pressed
Verify the scan tool parameter:Horn Switch=Inactive
- If not the specified state
Refer to: Circuit/System Testing - Test 1
- If the specified state
- If not the specified state
- Operate the component:S33 Horn Switch»Pressed
Verify the scan tool parameter:Horn Switch=Active
- If not the specified state
Refer to: Circuit/System Testing - Test 1
- If the specified state
- If not the specified state
- Perform the scan tool control function:Horn Relay Command »On and Off
Verify the component turns On and Off:P12L Horn - Left & P12R Horn - Right & The horn should emit a clear and even tone.
- If none of the components operate
Refer to: Circuit/System Testing - Test 2
- P12 Horn - Inoperativeor If an abnormal noise is present
- Refer to: Circuit/System Testing - Test 3
- If the component turns On and Off & If no abnormal noise is present
- If none of the components operate
- All OK.