Can't get horn to work (aftermarket steering wheel)

[zboost]

Have a SAAS steering wheel and on the back of the horn button are 2 connectors.
There is also a yellow wire coming out the boss kit, which was already connected to one of the connectors on the back of the horn button when I bought the car.

Have checked and there is power going through the yellow wire but still no working horn.
Is there anything else that needs to be hooked to the button with the yellow wire?

https://lh6.googleusercontent.com/-xWBZWmlRz-Q/VMrEQOLxOUI/AAAAAAAACYo/oZqI1iPd8SE/w480-h360-no/received_779639408739764.jpeg.jpg

[cotbu]

The only thing I think you have to do is ground the ring the button sits in and if it still doesn't work. Swap pins and or test by grounding the wire manually. And then check fuses and horn and horn wiring.

Could be a fuse or faulty button.

Sent from my Highly Tuned Note4!!!

[zboost]

Tried manually grounding it, checked fuse was blown so I replaced it and it was still not working. Will try get a new horn button and hopefully it fixes it.