Zero instructions or wiring diagrams; you're on your own with these, folks.

These horns look to be well constructed, and I'm hopeful they will perform as advertised, but it might take me a while to find out because no instructions of any sort are included with these horns. You get the high-pitch horn, the low-pitch horn, and a relay. Wiring instructions are listed as included, but they are nowhere to be found. Moreover, the Hella website is useless in this regard: it has dozens of pages of marketing hype on their products, but no wiring diagrams--and no contact link to ask whether it's possible to have one sent. Even when I figure out how to install them, this will be the last product I buy from Hella. Life is too short to deal with products from companies that do not support their customers.

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