#11494, "RE: stock horn w/ aftermarket alarm?" In response to In response to 2 Sep-04-05 08:42 PM by WickedESi
Originally posted by 96rs-t thanks. Yeah, i think if i just splice into the pos side of the stock horn, it should be ok. I'll give it a shot.
Careful, that will fry your alarm.
The car has a relay on the horn in the main fuse boxy under the hood, no sense in added another so this is how you use it:
Most alarms w/ a factory horn output have it set as a (-) neg. output (usually 500 mA max), so just run it to the brown wire w/ white strip in the stearing column, and it will use your stock relay!
When my alarm goes off it will fire my 6-tone 120db siren for for about 2 seconds, then BLAST my air horn that I wired in place off the stock horn.
It will wake everyone up within one block
Joel Baldridge, ASE Certified Master Technician, Audi Certified Expert Technician
