791XV Alarm Trigger wire?

you can use H4 has a - horn output (brown) which you can set constant and use that for the sirens, it will only trigger when the alarm is going off.

I dont see an h4 in my wiring diagram, or anything listed as a horn output.  I have a brown siren output and a brown + brake shutdown wire.  Where should I be looking? 

infinkc wrote: you can use H4 has a - horn output (brown) which you can set constant and use that for the sirens, it will only trigger when the alarm is going off.

DITTO:

Page 16 in Manual..........

BROWN..........Horn wire

MO

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My alarm doesnt have the H4 harness with the wires you mention for some reason.  Older or newer version? I dont know.

Brown wire is the same wire for Siren which is the same wire you can use for horn from a relay. Why not tap into the same siren wire? USUC World Champion - Stock System Class, Super Street Division. Special Edition Bose 26 piece speaker system with enhanced ported tweeters. 89.2 db Legal, 89.6 db Outlaw

Siren chirp will activate relay on arm and during warn-away sequence.  That chirp is setting off my audio sensor in the interior.

You may not have the horn output on yours.  Dei added it to the 791 very recently so there are still those that do not have that output.  The easiest way possibly to make it so the interior sirens don't setoff the audio sensor is to wire up a relay to disconnect the audio sensor when the sirens are activated.  IF you need it here's how.  85-ground. 86 to brown siren wire.  87a to one side of audio sensor blue wire.  30 to the other side of the audio sensor blue wire.  Forgive me if I got the wire color wrong for the audio sensor I know it's either blue or green it's been a while.Cause I'm So white and nerdy...

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