Horn System: Inspection

WARNING: This page is about a different car, the 2004 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT LOW PITCHED HORN ASSY
1. Connect the positive (+) lead from the battery to the terminal and the negative (-) lead to the horn body, and check that the horn blows.
If the result is not as specified, replace the horn.

Fig 1: Connecting (+) Lead From Battery To Terminal And (-) Lead To Horn Body
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT HORN RELAY ASSY (Marking: HORN)
1. Remove the horn relay from the engine room J/B.
2. Inspect the horn relay continuity.
  Standard:
Fig 2: Specified Condition Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Inspecting Horn Relay Continuity
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the result is not as specified, replace the relay.