Alarm failure

[Marius101]

Hi everyone. So we have the Yaris t3+ 61000km on the clock. I fitted the genuine alarm module about 10 years ago. This module uses its own remote. When the vehicle is locked you press the alarm to arm and sounds once for armed and twice for disabled. Since yesrerday the alarm does not sounds anymore. The hooter and fises all checked, module works but still not able to check the horn wiring from the module. The alarm went off while checking under the hood strange enough.  Im not sure if the yaris has its seperate alarm horn or if it uses the main horn.  Any ideas? 

[Marius101]

Anyone able to assist?