Check Horn Operation

WARNING: This page is about a different car, the 2011 Subaru Tribeca. However, it is still accessible from the selected car via links, so may be relevant.

Step	Check	Yes	No
1 CHECK HORN OPERATION. Make sure the horn sounds when the horn switch is pushed.	Does the horn sound?	Go to step 2.	Check the horn circuit.
2 CHECK HORN OPERATION. Disconnect the harness connector of body integrated unit (B280). Connect the harness connector terminal to ground using a suitable lead wire. Connector & terminal (B280) No. 11 (+) - Chassis ground (-):	Does the horn sound?	Check the body integrated unit. Refer to BASIC DIAGNOSTIC PROCEDURE Basic Diagnostic Procedure.	Check the harness for open circuits and/or shorts between the body integrated unit and horn relay.