IDing and removing older DEI unit

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=57343
Printed Date: July 07, 2025 at 5:20 PM

Topic: IDing and removing older DEI unit

Posted By: pipetteman
Subject: IDing and removing older DEI unit
Date Posted: June 09, 2005 at 12:35 AM

Hi, I just found this forum, lots of good info here! This might be a stretch, but I wonder if anyone here can help me identify the alarm I have installed in my 1995 Nissan 240Sx and recommend how I should go about removing it. The alarm is a DEI unit. I have had the car since 1997. I have never had the key fob / remote and to my knowledge the alarm has never been armed while I have owned the vehicle. The FCC ID is EZSDEI437. The serial is A403240 11 1. There is no "Viper#" or any other identifying digits on it that I can find. The harness is:

RED / white (-) output ch.2
Red (+) 12V power
brown (+) siren
yellow (+) input switched ignition
black (-) input chassis ground
violet (+) input door switch
blue (-) input warn / trigger
green (-) input door switch
BLACK/ white (-) output dome supv
WHITE/ blue (-) output ch.3
white (+) output parking light
orange (-) output when armed

Along the side of the unit:
shock sensor 4pin (connected)
status LED 2 pin (not connected)
VRS switch red 2 pin (not connected)
prog switch white 2 pin (not connected)
valet switch blue 2 pin (connected)
door locks white 3 pin (connected)

Does anyone know what it is? The alarm was poorly installed. The brain is dangling above the clutch pedal, suspended by a bunch of wires and electrical tape complete with fuses and two relays. What is the best way to remove this alarm? Is it as simple as disconnecting every wire and pulling the whole thing out (without disrupting the ignition harness)? Thanks! posted_image

Replies:

Posted By: diabloscope
Date Posted: June 09, 2005 at 2:17 AM

Not to ba a Dick , but You did say that You Installed It !!!

( Hi, I just found this forum, lots of good info here! This might be a stretch, but I wonder if anyone here can help me identify the alarm I have installed in my 1995 Nissan 240Sx )

From the wiring you described ,sounds like it could be very well a Dei product , could be Hornet , Python , Viper or Valet .

You should have a starter disable relay , it would have two 14 guage wires , black and a green wired to a relay socket , if you disconnect the brain to the alarm , or un-plug the brain the car should start , the relay should be normaly closed ..

All you have to do if you dont want any part of the alarm in the car just connect the black and the green 14 gauge wires together Graned they are connected to the black. / YELLOW starter wire !! Good luck !!!

Posted By: pipetteman
Date Posted: June 09, 2005 at 10:38 AM

Woah, sorry, by "alarm I have installed in my", I meant "have" to mean "to possess" and not "have installed" to mean the past participle. I edited the post for clarity. I would never have done a such a hack job! I actually have the shop's name and number who did the installation (sticker on the side of the car). I called them but they were of no help. Thanks for the advice, I'll take a look at it this evening.

Posted By: kgerry
Date Posted: June 09, 2005 at 3:03 PM

dont begin to explain proper grammar rules here... you'll frustrate the heck out of yourself....

the unit sounds to me like it might be a Rattler or Hornet.....

-------------
Kevin Gerry
Certified Electronics Technician
MECP First Class Installer

Owner/Installer
Classic Car Audio
since 1979

Posted By: auex
Date Posted: June 09, 2005 at 9:08 PM

There is no way to know what the unit is with out at least a picture. But I don't know why you need to identify it if you are removing it. Just go ahead and start cutting the alarm wires at the connection and taping the bare wire. You will also need to reconnect the starter wire as diabloscope pointed out.

-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

Posted By: kgerry
Date Posted: June 10, 2005 at 10:00 AM

if it was a Viper, Python or AutoMate model (they all had a 437 model in the mid-ninties) it would certainly say so on the brain as these were their premium brands.... Rattler, Hornet and Sidewinder also had a 437 model during these years and since these models were interchangeable, they didnt have a name on the brain, just a rectanglular flat spot on the brain were the logo would usually be.....

as already mentioned, the only wiring you need to worry about would be the starter kill wiring...... everything else can just be unplugged and tied up without cutting anything.....

-------------
Kevin Gerry
Certified Electronics Technician
MECP First Class Installer

Owner/Installer
Classic Car Audio
since 1979

Posted By: jrilla
Date Posted: June 10, 2005 at 5:38 PM

You should install a new one. With all the wires found and tapped into , a new one would be a piece of cake to install.

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J Rilla

Owner/Installer