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Coding F2x/F3x Horn to work along with alarm siren - Printable Version

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Coding F2x/F3x Horn to work along with alarm siren - sas46 - 14-02-2023

In my country steering wheel and HU thefts are very common, so I'm looking for a way to make the horn play along with my alarm siren. I've already coded the US siren but I think it's not enough.

I have an F20 lci2 with the 302 from factory.

Looking on TIS the siren is controlled by FZD, I've looked in every CAFD but I didn't find any related fdl.
Do you know any method to make it work? Even some hardware modifications

Thank you