bmw alarm
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=121113
Printed Date: October 31, 2024 at 6:24 PM
Topic: bmw alarm
Posted By: drvasile
Subject: bmw alarm
Date Posted: April 01, 2010 at 4:04 AM
I have a e36 1995, came from Italy, with a Gemel alarm (control unit and siren). The problem was in disapearing of
the siren sound. In a forum I found that the problem may be in the siren batteries, I replaced them, with no effect.
Now it is dead. I found a siren from an e38, Gemel too (I think), most e38 and e39 equiped with it. So on my siren
there are 6 wires, on a new one only 4. I connected the brown to brown (-), red to red(+), PURPLE / white (trigger)
from control unit to BLACK/ blue of siren, and everithing works. But I am afraid there is no charging of batteries.
When I connect the BLACK/ red from control unit to BLACK/ red of siren a 4mA current appears in the red - brown
circuit (without it 0.4mA), so I suppose this BLACK/ red wire is responsible for charging, but with this wire
connected the alarm begin to make noise when I turn the ignition off (1 from 3-5 cases) (and there is a voltage drop
from 12V ign on to 7V ign off on this wire). By the way on my old siren shortcircuiting this BLACK/ red to red by a
key in the glovebox the siren became quiet. The remaining 2 wires from my old siren are the second brown and a
WHITE/ black with a 0.15V on it.
So, what is the BLACK/ red responsible for. If charging - I shoud connect it, then what to do with the activating
siren when ignition off. And how to make the siren quiet (sound only when disturbing the car)
PS The new siren begin to make noise when disconecting any of these 4 wires, even if I do not activate the alarm,
the old one did not.
Plese help and sorry for english and techn. I am a neurosurgeon.
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Replies:
Posted By: drvasile
Date Posted: April 01, 2010 at 4:05 AM
BMW 320, e36, september 1995
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