Check your harness again. A lot of 2003's have the wiring and plug for the 2nd horn taped off. If it isn't there then just tap into the existing horn's wiring and you can find compatible electrical spades or modify them to fit your new horn. Or can go to your dealer's parts dept with your horn and match it up with one of the connectors they have in stock.
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2002 Almond Pearl Limited Edition 27K
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