i'm curious, how do the alarm sirens work? if you feed them power, will they just make noise?

Most sirens take a 'constant' 12V... they cycle their 'sounds' automatically... no need to pulse the 12V to them...

hmm..do the maximas stock alrams have a wire that sends a constant pos or neg signal when triggered? i'd like to set up a shock sensor /w a siren for my max. it'd be like 20$ and a lot cheaper than a real alarm

There's a lot of weakness to the factory alarm but if you really want to...

You can add a shock sensor... Look for Russ's post on how to do it.

Why not just buy a set of air horns (about $25) and splice them into the horn... much louder and you can use it with the horn too!

OEM outputs pulse +12V. It's possible to turn a pulse +12V to a constant 12V with relays. I got lazy and just installed air horns.

yah, I've got air horns already, I'm going to set up a shock sensor /w a siren that runs swithced off of the OEM alarm as well as have it chirp on arm/disarm...maybew

Does anyone know where to get a doulble shock sensor for Viper alarm or AKA for DEI product?
Also, anyone knows how to add second siren and how to setup backup batteries for them? Where can I find help forum specifically for alarm help or quality DEI alarm parts on the internet? Many thanks in advance!

any local shop that sells DEI alarms!

Ho Ho Ho~ HECK NO man..
I went to the place where they hook up Vipers and they told me $40 for one freaking shock sensor! I told him you ain't gonna rip me off and I took off man..
Come on guys! I'm sure someone knows!

I don't know if the DEIs usea negative triggeror pos trigger, but here's a shock sensor and a proxy sensor:

http://cgi.ebay.com/ebaymotors/aw-cg...160085&r=0&t=0

http://cgi.ebay.com/aw-cgi/eBayISAPI...tem=1292855609

EWO~ that thing looks so cheap man... plus the radar sensor will not work on my Max because my window is very dark tinted(metalized)...
Well, thanks anyways.
Come on guys I'm still waiting~

They have both - door triggers as well as + ones (e.g. Ford cars)