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Discussion Starter · #1 ·
Hi, i have 2 questions:
1. Has Antheft alarm system siren internal accu?
2 how mach current /mA/ the siren consume in stan-by mode.

The problem is that this siren stood unused and unpowered for a half an year before I decide to used it retrofiting the alarm system. Now I measure only 56 micro Amps /0.056 mA/ curent when the siren is powered and is in stand-by mode so I doubt if the siren is OKor not. If there is an internal accu in it, I think the consumed current must be more and more highger than measured 0.056mA, if there isn't internal battery inside the siren maybe it's OK.
I can't check if the siren is in working condition.
 

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Circuit/System Description
The content theft deterrent system uses the power sounder to provide an audible alert when in the alarm mode.
The power sounder receives a constant B+ and ground.
The body control module commands the power sounder via serial data.
The power sounder is also equipped with a battery backup. If the power sounder is disconnected while the
ignition is OFF, the battery backup will allow the power sounder to sound the audible content theft deterrent alert.
 
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