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well on the pre-2011 systems, the specific number of horn honks/chirps after non-startups were used to help troubleshoot the system. But I have yet to find a technical file that describes the new 2011 factory system in greater detail and how to troubleshoot it. Also, since it's all plug-n-play now, there's not really much you can check on your own (like if a wire came loose or something), so it sounds like you have to take it back to the dealer.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
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