am getting my alarm installed tommorrow at Circuit City. I mounted the 2 sirens (the 850VX siren & a DEI Piezo) myslef since I did not want them to be visible when looking at the engine bay. I am wanting to run the wires back to where the brain will be. Do I have to run all 4 wires back to the brain or can I splice the 2 sirens together (black with black / red&black with red&black) and run 2 wires back to the brain loaction? The 2 sirens are located next to each other and which is why I ask.

I do plan to add another Piezo or 2 (inside the car) in the future.

Thanks for any help on this!

PS <> Each siren has 2 wires: 1) red 2) red/black

 

I woudl run a relay system off the other siren

 

For one Piezo in a DEI system you can splice them together. If any other additional sirens are added other than what u mentioned use a relay.

 

Instructions:
1) Locate solid brown wire from main tree branch off the brain.
2) connect main siren (red) to it and ground (black) to a seperate chassis area.
3)Tap piezo(if dei=red) 12v into main siren (red) and seperately ground piezo(if dei, black).
*Suggestion: relocate the piezo from under the hood to into your cockpit. this in return will equal a loud, highpitch screetching inside your car, which will deter and annoy most thieves.
*The Obvious: alarms will deter theft but if someone knows what they are doing they'll get your ride. I suggest buying a battery back up, couple more piezos, some relays, and go all out on hiding your brain, and bat backup. ie: behind gauge cluster, etc. use loom and 3m to help hide it. if u do it, do'em right. 99.9% of stereo shops put them in acessible areas.
Completion: after completing this you'll have a pain in the ass car to break into which won't be invincible, but maybe it'll buy u time to catch them and whoop some ass..