I'm trying to wire up a new horn/sirens for the factory alarm.
Ive have 3 of these Sirens that are ear pericing loud they actually hurt a bit, they will be aimed inside the the cabin they are small a don't draw to much.
http://cgi.ebay.com/SIREN-HORN-FOR-C...item27ae2ad597

And one of these Horns, That will be outside hidden somewhere.
http://www.amazon.com/FIAMM-74100-El...pr_product_top


Here's where it gets weird I have a 12v source from my amp tunning a relay for the new set up and only touching the power wire from the factory horn as a signal wire. Running the relay that came with the blaster horns. Ill list the symptoms below.

The car will lock and beep when locked.

When the alarm is set off via panic the REAR HATCH UNLOCKS REPEATEDLY(WTF!!!) and the beeps are erratic.

Tried hooking the dead stock horn up and it works minus noise, its only when the power wire is tapped into the relay does it act up(unlocking the trunk repeatedly) even if the stock horn is left hooked up and the wire just taped for the signal.

Also doesn't matter if the high pitched sirens are unhooked or the blaster just when the relay is connected.

The relay tests fine. Any ideas on why the trunk would unlock. Just seems so random to me.... its only the wiring for the stock alarm horn being touched????