bmw old alpine alarm sound on dei 554r

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=129469
Printed Date: July 13, 2025 at 1:40 PM

Topic: bmw old alpine alarm sound on dei 554r

Posted By: magas
Subject: bmw old alpine alarm sound on dei 554r
Date Posted: November 30, 2011 at 9:19 PM

I always wanted the original BMW Chirp alarm for my car (99 bmw m3).... its the one you always hear in the movies...
Here are the tones
https://www.youtube.com/watch?v=_ht_C5s0EGw

My alarm is a Valet (DEI) 554r alarm and it works great, I got a siren from an old e36 stock OEM alarm (made by alpine?)
part number 82 11 1 467 019.
posted_image

I wired in the BMW siren to my alarm, but it doesn't work correctly.

Problem is that the unlock lock tones are not long enough to trigger the alarm.
Lock gets me no sound and unlock gives me one faint chirp.
If the alarm is triggered it works perfect and I get an alarm sound.

I am assuming the DEI alarm is not sending a pulse that is long enough to trigger the siren to put out the tones...
Can anyone think of how I can get around this? 555 timer? relay.... something?
I already looked at my alarm settings there is no way to adjust the 12v pulse duration for the lock and unlock.
Looking for someone that is smarter than me for this project?

Replies:

Posted By: howie ll
Date Posted: December 01, 2011 at 3:32 PM

Use a DEI 528t timer, feed it via diodes from the lock and unlock wires, that will change it from 0.8 secs to however long you want it.
See diagram:-siren_sound.bmp
Notes join a 1N4004 diode from lock and unlock to BLACK/ white,
Join red to brown to 12v+ constant and use a 5amp fuse,
Yellow from 528 to siren,
Orange wire don't use.
Blue loop, don't touch.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Posted By: magas
Date Posted: December 01, 2011 at 10:00 PM

WOw thats awesome thanks,,...
never seen one of these... I will try it.
Have you tried this setup b4
?

Posted By: magas
Date Posted: December 01, 2011 at 10:11 PM

Also why does it need to tap into the lock/unlock output?
Should it just be able to detect and increase the pulse based on the single or double pulses from the alarm siren output?

Also with this can I still unlock the car with the stealth mode option (no siren chirp?)

Posted By: howie ll
Date Posted: December 02, 2011 at 3:19 AM

No, wiring it from the siren output will double you pulses! Also slightly simpler my way.
If you have any queries with/about the alarm or R/S part don't hesitate to post, I wrote the definitive install guide to the E46.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Posted By: magas
Date Posted: December 02, 2011 at 1:10 PM

will this still keep the stealth (no alarm unlock option)?

Posted By: howie ll
Date Posted: December 02, 2011 at 2:30 PM

If you mean silent arm/disarm no.
Also if the alarm has comfort control you won't be able to program that either.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Posted By: magas
Date Posted: December 02, 2011 at 5:59 PM

I really wanted to keep the silent arm, disarm..
You dont think there is anyway to keep this by just using the pulse that comes from the siren output?

Posted By: jeffsomeone
Date Posted: December 02, 2011 at 10:47 PM

your alarm can be changed from a 0.8 second pulse to a 3.5 second pulse by entering the #1 menu and changing 1-6 from the default 0.8 second to the 3.5 second

Posted By: magas
Date Posted: December 02, 2011 at 11:28 PM

I believe that 1-6 is only for the door lock pulse.... and not the siren pulse.

Posted By: howie ll
Date Posted: December 03, 2011 at 12:53 AM

You're right it is only the lock pulse, try using the siren pulse to feed the 528t, use this modified diagram:-Z88_siren_sound.bmp
This time the horn output goes directly to the 528t BLACK/ white wire and you cut the 528t blue loop.
This will give you the silent arming option and should work properly, i.e. no double chirp when there should only be one.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Posted By: magas
Date Posted: December 03, 2011 at 2:02 PM

Dang it!

I hooked it up and tested it but can't get a positive pulse from the orange wire
At all.
The 528 t clicks but none of the output wires supple a 12v output to make the siren chirp.
Any ideas?

Posted By: magas
Date Posted: December 03, 2011 at 3:00 PM

Howie thanks for the help, here is how I finally did it

12v constant to red and yellow
Ground to black
Blue loop cut
12v alarm pulse from alarm to BLACK/ white
Yellow unused
Brown to siren as 12v to make sound

Thanks again hopefully will help someone else

Posted By: magas
Date Posted: December 03, 2011 at 4:51 PM

Crap!

Well here is the latest update. The lock unlock soft chirps work fine but the alarm sound is very weak soft chirps! I adjusted the alarm between constant siren output which produces no sound to intermitamt on which
Only makes soft chirps.
This sucks. Any one have a solution?

Posted By: magas
Date Posted: December 03, 2011 at 4:53 PM

I just need something that will increase a 0.5 second pulse to one second and a constant pulse to constant.

Posted By: magas
Date Posted: December 03, 2011 at 5:40 PM

Finally fixed it. Well I decided to keep the setup and placed some one way diodes and bridged the siren output to siren input in addition to what I did b4. Finally works perfect.