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Topic: Burglar Alarm wired to Stereo (Read 874 times) |
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Dave2302
Senior Member
2006 Mercedes S55 AMG, Retired Barefoot Waterskier
 
Posts: 1119
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Burglar Alarm wired to Stereo
« on: Sep 23rd, 2011, 12:45pm » |
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Hi guys.................
On the Scorpio and on the Puma there is a black / red thin wire connected to the stereo which triggers the alarm when the stereo is unplugged with the alarm set.
What I need to know, (as I am not having a stereo), is to keep the alarm functioning 100% what do I do with this lead ??
The door switches are permanently earthed when alarm is set and doors shut, and earth breaks to set off alarm, when a door is opened, or a wire cut.
Should I connect the stereo one to earth, so the alarm thinks its still fitted ?
Any knowledge on this ?
Has anyone had alarm problems when fitting an aftermarket stereo, such as LED not flashing correctly, alarm not setting etc ??
Cheers Dave
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Dave "The 'ol Bear" ex Footer !
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Mike H
Senior Member
Renault Clio
Posts: 2594
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Re: Burglar Alarm wired to Stereo
« Reply #1 on: Sep 23rd, 2011, 1:27pm » |
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Have to agree with you either it connects the earth through the unit, or is possibly connected to +12V.
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Mike H
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Dave2302
Senior Member
2006 Mercedes S55 AMG, Retired Barefoot Waterskier
Posts: 1119
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Re: Burglar Alarm wired to Stereo
« Reply #2 on: Sep 23rd, 2011, 3:21pm » |
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What I've done for now is left 12" of the wire at the Pumas GEM Unit (like Scorpio CCM) and when it's all up and running I'll Scan the alarm for faults, if it shows a fault related to Audio unit I'll try earthing it !!
If no faults and alarm works ok I'll snip it at the GEM Plug 
Don't want to blow up the GEM though, so I was hoping someone on here might know for sure
I suppose I could take an old stereo apart and see where the relevant pin goes
Anyone else have a clue ??
Cheers Dave
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Dave "The 'ol Bear" ex Footer !
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Matt
Senior Member
Manual'd and a 4.0 in the making
Posts: 2816
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Re: Burglar Alarm wired to Stereo
« Reply #3 on: Sep 23rd, 2011, 4:18pm » |
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Dave it should say on the TIS cd
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FDS2000 Scans - Birmingham
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Simmo
Administrator
I'm an OAP !
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Re: Burglar Alarm wired to Stereo
« Reply #4 on: Sep 23rd, 2011, 5:41pm » |
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If you look at This page or the alternative one,via button on the left, for later radios perhaps that will help?.
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Now I'm an OAP
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Dave2302
Senior Member
2006 Mercedes S55 AMG, Retired Barefoot Waterskier
Posts: 1119
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Re: Burglar Alarm wired to Stereo
« Reply #6 on: Sep 24th, 2011, 9:26am » |
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on Sep 23rd, 2011, 4:18pm, Matt wrote:| Dave it should say on the TIS cd |
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On the TIS CD it just shows the wire going from alarm to the Stereo, but it doesn't show what happens to it inside the stereo
Looking at the links, the Stereo one shows nothing, but Mike H's link, shows the connection on the Alarm diagram, (it is Bk / Og tho), and on the Scorpio diagram this goes to the Stereo and is earthed through it
The Puma diagram doesn't show the earthing only the wire................
I'd imagine it is still an Earth, so will try that first
Cheers
Dave
Cheers Dave
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Dave "The 'ol Bear" ex Footer !
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Mike H
Senior Member
Renault Clio
Posts: 2594
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Re: Burglar Alarm wired to Stereo
« Reply #7 on: Sep 24th, 2011, 1:50pm » |
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Could be it was black/orange, but the orange has gone dark so looks like red now(?)
I think it unlikely that some "special signal" goes up it from the stereo so I'm with you, think it's just a separate wire so that there's no ambiguity, i.e. it can't be accidentally connected some other way to make alarm think it's OK.
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Mike H
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