Ive had my viper alarm for years now and lately the siren isnt always chirping when i arm or disarm it. Im not accidentally silencing it. I read recently that if everything else seems to be working but theres no sound from the siren that it went bad and i can just replace it. However my siren operates randomly. I could park it one night and arm it with no chirp and the next morning it will work or vice versa. I did as much of a visual inspection as i could from the wire leading into the firewall to the control box but was not able to inspect every inch of wire without needing to undo much of the wiring from the install. Most of what i could see didnt indicate any damage to the wiring since it was still wrapped up and not near anything that would cut into it. Is it possible the siren is still the issue and needs to be replaced or are there other possibilites for me to look into?

In case someone needs to know its a viper 591vx.

 

It it works some times, then you know the siren is working. I would check the ground point of the siren, make sure it's clean and reconnect it. If that does not work then check the point where the siren is connected to the brain. If you had some one installed it, then take it back and ask them to fix it.

 

It was installed over 5 years ago so not a simple option to take it back. Both wires lead back to the control box so thats what i also forgot to ask. If someone could chime in on the wiring. Id have to unwrap the wiring to trace but my assumption is that both wires are in the wiring harness at the control box. From there i dont know if it runs elsewhere that might play a part. In the meantime any information would prep me for when i can get back in there.

 

If the siren is that old and in the engine bay next to heat. It could have a bad circuit board. 5 years is a good time for it. Mostiure and heat will take its toll on it. I would test it at the brain and make sure the brain is giving 12 volts output during arm and disarm and during full trigger. If your local come by and Ill toss you a siren to try.

 

I was hoping you might see the thread! Whether the siren chirps or not during that test, it will tell me if the source of the problem comes from the brain. Sound logic, thanks.

Do you sell replacement sirens cus a short drive from torrance might be preferred rather than waiting for shipping from ebay. There was a revenger viper replacement for 17 bucks shipped.

 

Trade you siren for red bull! Ill take a look at it for you too if needed.

 

The best offer I have seen all year. Take it hommie. He's a good but busy guy. A minute of his time is worth a million now days. Lol.

 

Truth. He once spent 45 minutes on the phone with me explaining some alarm stuff. Ill try to do the voltage test before i borrow some of your time and ill call to give u a heads up if im dropping in.

 

Heck, I would drop in whenever I can just to learn. Hey, so where does he or his shop located?
Thanks.

 

Finally got around to checking for voltage. Had to wait til it was not chirping to test so that i know it was under non operating condition. Connected terminals to the red and black wires on the brain and got no reading static or when arm/disarm pressed. Then i realized that i need a reading while it was working so since i couldnt reproduce it by wiggling wires i tried wiggling the siren and it started chirping. At first i thought maybe the zero reading suggested something might be wrong with the brain but this strongly suggest it was the siren that wasnt closing the loop on power and ground from the brain. When i rechecked voltage after i was getting a 12v reading without pressing the arm/disarm button. So looks like it is the siren but looking for a second opinion from the man (desmond). If so i wonder if i can repair the issue (loose wire/connection internally?) but it might be simpler to just put in a new one.

 

Well you posted first that you had no reading on the power or ground at the brain. So we now found the problem. Bring it by and ill look it over.

 

Ran into desmond coincidentally at the shop cus its where my friend takes his car and per his reputation, the man came through.

Does anyone know if i need to use a relay to run 2 sirens off one brain or is there enough power to tap into the same wire? A description for how to hook up the relay would be appreciated. I can wire according to instructions but dont know relay intricacy on my own.

Also planning to use one of these soon.
http://www.ebay.com/itm/Directed-DEI...item4abca50852

 

If so, something like this? Id just have to figure out what sources to use if i can understand it well enough.

"Just get the standard Bosch-style relays that you can get at Radio Shack for $3...

Pin 85 to ground
Pin 86 to your siren output (if it's a + output, which it should be)
Pin 87 to a fused constant power source that equals the rating of both sirens
Pin 30 out to all your sirens (which each siren separately fused to protect them from each other)"

 

Don't waste your money on a new siren, Fix the issue I should you from the start. Thats your biggest problem. If I can do that to your car, Adding a second siren is not going to be a help and is not protecting the car.

 

I was planning to get in touch with you about that also replacing the siren with the one you gave me and adding a second. I just need and want to be sure I wire correctly.

 

Look at blakes setup. Thats all you need. Your trying to do to much.

 

I got four sirens off a relay two outside and two inside and they all hooked up to a relay like the guy described above

 

I'll ask him more about how his is set up but he cant help me with how. lol The only thing extra im trying to do is add a second siren, which isnt a priority but i do need to know if a relay is needed or not. The rest has to do with what you mentioned the other day, the kill switch, main relay and starter kill. Im going to pop in the replacement siren you gave me but in a new location.

 

Get a relay, 30 to the siren or sirens, 87 to 12 volts, 86 ground, 85 to alarm 12 volt output. Pointless cause if a theif pops your hood and unplugs you battery like they all do. The siren is not going to go off. And its very easy to pop a hood without setting off a alarm.

Instead of wasting all this time, money and effort. Get a dei 520t and redo your current system. I seen your system and its not going to provide any security. All your doing is providing false hope for yourself. The theif is going to do the samething I did with two sirens..smh

 

I can put 20 sirens on a car and it does not mean anything if the setup is not proper from the start.

 

The second siren was going to have a back up battery built into it but am i wrong in thinking it wont work when power to the alarm has already been killed?

If you sell the 520t's ill pick one up from you, otherwise ill try online.. price looks good. I need some info regarding the main relay and stuff anyway.

http://www.sonicelectronix.com/item_...cted-520T.html

 

Same price.

 

they can also cut the siren wire just so it wouldn't sound off, my sirens are placed so it's not easy to get to to cut the wire. true that they can disconnect the battery, i'm not to worried about that since my hood release handle is messed up(previous owner broke it) and i tucked the cable into the kick panel.
but like i tell everyone thinkin an alarm is gonna keep them from stealin ur car, it's a "theft deterrent" and if they really wanted ur car they gonna take it

 

If they take your car with your alarm (driven away). Your install sucks. Period. And if they tow it. You sould have some sort of gps tracking.

 

I'll come by sometime then. Thanks desmond.