Alarm Siren

[ZGadson]

I kept the siren from my old car and today I put it in my I35. I have it wired to the security/keyless entry module under the dash (specifically, its spliced into the power lock wire). I found the parking light relay and had it connected to that 1st, but then if I had a turn signal on, the siren chirped with the signal.

I want the siren to chirp with the lights, but not with the turn signals. Any ideas where to connect to? The lock wire is ok, but I want the car to chirp, not whistle, like it does now. The power going through the lock wire lasts too long, so it almost sounds like alarm is starting to go off, but then gets cut off.

Any ideas?