Remove the front bumper cover. (Refer to Body - "Front Bumper Cover")
Remove the high-pitched and low-pitched horns after disconnecting the horn connector (A) and loosening the mounting bolt. [Low-Pitched Horn][High-Pitched Horn]
Installation
Install the horn after connecting the horn connectors.
Install the front bumper cover.
Inspection
On this vehicle, the horn relay is installed in the PCB block of the engine room relay box.
The solid-state relay inserted into the PCB is not serviceable separately.
If the relay needs to be replaced, replace the PCB block and perform the test.
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Test yourself
A quick Hyundai Elantra AD quiz: every answer comes with an explanation and a link to the manual page.