a couple quirks with the viper 5901

So I've installed the security features (still have yet to do the remote start) for my viper 5901 and I'm having a couple issues. First, and this is the least important, but about 30% of the time when I hit the disarm button (from either remote), the doors unlock and the siren chirps twice but the flashers only flash once. It's not an issue with the flashers since I only feel the brain's onboard relay click once. It also seems like the second chirp is weaker than normal, or it ends too short. Second, the actual alarm seems odd. The siren seems to restart after 3 seconds and doesn't go through all six tones or whatever. And lastly, the remote simply wouldn't stop the alarm. I tried hitting the arm button, which is supposed to stop the alarm but keep the car locked, and the disarm button. Any idea what is going on? Could they be related?

So I was thinking why not obey the site rules and tells us make, model and year then we might answer your question.

I would take it back to the installer and have them swap out the brain under warranty.  The issues you are having all seem brain related, not installation related.Kevin Pierson

Kevin, I'm thinking this is self installed...so he would take it back to himself. The symptoms you are describing could be a bad ground. or a bad brain. or a bad install.

Apologies, I didn't think which car it is was relevant. It's a 2001 toyota celica. And yes, it's a self install, and it was installed correctly. My ground is good.

How do you know your ground is good?  Because that was my first thought, frankly that car or the Supra are not "problematical".  If you're getting the correct voltage measuring the PD between the reds and the black at the brain AND the antenna plugs are properly pushed home then I'm with Kevin on the brain.

Yeah the voltage between the red and black was correct (was the first thing I thought of as well), but I will double check just to make sure. I'll give the place I got it from a call.

Gave them a call and they're going to send me a new siren, brain and antenna.

where did you get it from?

pacificstereo.com. It was super cheap too.