2006 aygo sport horn not working

[JeffB]

Hi,

i know there has been many post about horns not functioning but none of the topics helped me sort the issue. If somebody could help me it would be great.

Here's the symptoms of the Aygo 2006 sport horn issue....

1. I have tested the horm itself and functions as should

2. I have tested that pressing the steering wheel the switch grounds the connection to the steering wheel squib

3. No voltage gets to the horn when pressing the steering wheel.

4. 10amp fuse tested OK

From previous topics on the forum i am led to believe its either the steering squib, fuse box or relay at fault.

Does anybody have knowledge of how to test if the signal from the switch on the steering wheel is getting back to the fuse box or horn relay.

and/or a wiring diagram of the horn circuit

i have not found the horn relay, can anybody point out where this is??

Any more info to get the problem diagnosed welcome as the MOT is due next month.

thanks

jeff

 

[flash22]

The horn has 1 fuse, the relay should be in the engine bay Relay box (Nr. passenger side in the headlight)  its a simple circuit - button to the relay (ground side switch) when a squib (Clockspring) goes, the horn is the first to break, avoid Chinese clocksprings

 

https://cardiagn.com/toyota-aygo-em3125e-electrical-wiring-diagrams/ p187 or so

 

 

[eygo]

there is a fuse box behind the Battery under the bonnet ,the horn fuse is No9 and its rated at 10A

Fuses engine compt.77-78.pdf