308C Excavator Electrical and Electronic System – Horn Does Not Sound – Troubleshoot

Problem: The horn does not sound.

Solution: Check that the following connectors and components are connected properly: horn, horn relay, “CONN 4”, “CONN 30”, “CONN 37” and “CONN 40”. If the problem still exists, use the following procedure to troubleshoot the system.

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Schematic for “Horn Does Not Sound”