July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Scan Tool Output Controls
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Scan Tool Output Controls
Scan Tool Output Control
Additional Menu Selection(s)
Description
Horn
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The BCM activates the horn momentarily when you select ON.