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2004 Toyota Sienna Question: How to diagnose horn malfunctions?



andrewlocle, 3.3L V6, Wesley Chapel, FL, October 08, 2012, 12:08

My 2004 Sienna has a dual-tone horn. The high pitch horn has suddenly stopped working; only the low-pitch horn still works. How to diagnose this problem? What must I check? Thank you.

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