2004 Toyota Sienna Q&A

2004 Toyota Sienna Question: How to diagnose horn malfunctions?

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. -
Answer 1
CK PWR AT THE FAULTY HORN IF YOU HAVE PWR RUN AX. PWR TO HORN AND SEE IF IT WORKS IF NOT REPL HORN -
Comment 1
have not checked horn but what is the process to test horn -
Answer 2
no horn but fuse and horn relay are good -