1. Disconnect the negative battery cable..
2. Remove the front bumper..
3. Remove the horn..
4. Apply battery positive voltage to horn terminal A, and connect the horn retaining bolt to ground as shown in the figure, and then verify that the horn sounds.

If the horn does not sound, replace the horn.
Horn
Horn Removal/InstallationCheck Fuel Cap Warning Light
Purpose/Function
The check fuel cap warning light is built into the instrument cluster.
If the PCM detects that the fuel cap is open, the light illuminates to warn
the driver that the fuel cap is open.
Construction
Built into the instrument cluster.(See INSTRUMENT CLUS ...
Headlight Auto Leveling System
Outline
Automatically adjusts the headlight optical axis in response to changes in
load and passenger conditions to prevent blinding of oncoming vehicles from
headlight glare and to assure a range of visibility.
The AFS control module performs headlight auto leveling system fail ...
Engine Mount
Purpose, Function
The engine mount secures the engine and transaxle to the vehicle body, reducing
vibration and noise.
Construction
The three points at the engine front (No.3 engine mount), one side of the
transaxle (No.1 engine mount), and the rear upper part of the transa ...