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BMW 3-Series (E90 E92) Forum
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Extra siren for OEM alarm?
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| 05-29-2007, 05:39 PM | #1 |
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First Lieutenant
 
51
Rep 321
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Extra siren for OEM alarm?
Has anyone been able to add an extra siren to the OEM alarm? I tried investigating, and it is not as easy as tapping the siren's power and ground to the extra siren.
The OEM siren has 3 wires: constant 12v, ground, and what I believe to be a signal of some sort. Does anyone know what information is transmitted on this signal? Or if you know how to add an extra siren, please share  |
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