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.
Toyota Q&AAsk Your Question
2004 Toyota Sienna Question: How to diagnose horn malfunctions?
Answer #1Greg's Orange Auto (13991 Answers) , Orange, CA - (714) 361-9386globalhelper October 08, 2012, 13:07Master
CK PWR AT THE FAULTY HORN IF YOU HAVE PWR RUN AX. PWR TO HORN AND SEE IF IT WORKS IF NOT REPL HORN
Replychicano01, November 24, 2014, 20:15Rookie
have not checked horn but what is the process to test horn
Answer #2chicano01 November 24, 2014, 19:58Rookie
no horn but fuse and horn relay are good