dei 520t

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=103374
Printed Date: April 28, 2024 at 8:14 AM

Topic: dei 520t

Posted By: zerovandez
Subject: dei 520t
Date Posted: March 24, 2008 at 10:44 PM

So I'm completing and alarm install which has hood pins, and a tilt sensor as far as sensors go's. I also installed a DEI 520T. I've had this for years and never installed it until now. I've diode isolated all my sensors to the instant trigger. I've tested all my sensors and they work. The only one that doesn't work is the 520T. When I arm the alarm and disconnect the battery nothing happens. So I put the car battery back together and the alarm go's off! why is it behaving in the reverse? help.

Replies:

Posted By: JWorm
Date Posted: March 24, 2008 at 11:43 PM

Give it a few days to charge and then test it again.

Posted By: zerovandez
Date Posted: March 24, 2008 at 11:46 PM

Any technical reason as to why the alarm would sound when placing the car battery terminals back on though? anything to do with voltage of the battery? sorry, im a noob.

Posted By: davngr
Date Posted: March 25, 2008 at 4:53 AM

zerovandez wrote:

Any technical reason as to why the alarm would sound when placing the car battery terminals back on though? anything to do with voltage of the battery? sorry, im a noob.

lots of alarms engage when the battery is disconected then reconected. also remote starts at times may engage(ignite the engine) when the car battery is reconected that's why remote starts require* a hod pin kill swtch. you can imagine what would happen if someone putting in a battery had their hand/arm near a moving part.

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life is a comedy to think, a tragedy to feel

Posted By: brhaugen
Date Posted: March 25, 2008 at 6:23 AM

davngr wrote:

zerovandez wrote:

Any technical reason as to why the alarm would sound when placing the car battery terminals back on though? anything to do with voltage of the battery? sorry, im a noob.

lots of alarms engage when the battery is disconected then reconected. also remote starts at times may engage(ignite the engine) when the car battery is reconected that's why remote starts require* a hod pin kill swtch. you can imagine what would happen if someone putting in a battery had their hand/arm near a moving part.

Isn't that just a DEI "thing" ?
I haven't seen it in on Audiovox, Ultra, Astro, or Scytek units.
But I have on the Clarion and Valet models I have installed.

Posted By: zerovandez
Date Posted: March 25, 2008 at 9:18 AM

I was hoping that when the battery is disconnected the alarm would go off. Isnt that the point of a battery backup? What thief would put the car battery back on?