Ferrari Mailing List: Re: More Stereo Installation & Wiring Expertise Needed

[Robert W. Garven Jr. (rgarven]

Which would be the safest way?  I like the idea of the relay does it  
use the power from the radio wire or the power from the ignition on  
wire?  I am asking this as I dont want to blow anything up.


Robert W. Garven Jr.
rgarven [at] gmail.com


 "The Ferrari is a dream - people dream of owning this special  
vehicle and for most people it will remain a dream apart from for  
those lucky few". Enzo Ferrari






On Apr 11, 2009, at 11:49 AM, Charles Perry wrote:

> This would, of course, work, but I think Robert's question was more  
> how
> to find and attach to a switched power source.
>
> My recommendation would be to get a voltmeter/multimeter if you don't
> have one already. Set it to DC Volts. If it's not an auto-ranging type
> meter, pick a DCV setting that is appropriate for 12-volts. You can
> touch the black lead to any ground (unpainted body, cigarette lighter
> sleeve, existing radio ground, etc). Then use the red lead to check  
> your
> existing fuses and find one that reads 12V with the ignition on but
> drops to zero with the ignition off. Once you've found an appropriate
> fuse, you can use an item called a fuse-tap to draw power off of that.
> It's basically a little piece of bent metal that slides under the fuse
> and gives you a flat spade connector to which you can attach  
> terminal 86
> in Jim's scenario. In most cases, you would crimp on an insulated  
> female
> spade connector onto the wire to which you want to attach to the fuse
> tap.
>
> There are different kinds of fuse taps for different kinds of fuses
> (round glass, flat blade, etc), so make sure you buy the right one for
> your type of fuse. They used to have them at Radio Shack but you might
> need a better car stereo or electronics store now, or even a good car
> parts store. I like fuse taps because they are completely non- 
> invasive -
> they don't require you to cut, splice, or break the insulation of
> anything in the car.
>
> You can also use ScotchLok connectors (available at any car parts
> store), but these are insulation-displacement connectors and so they  
> do
> do some very minor but permanent damage to the wire you attach them  
> to.
> But they are quite reliable if you make sure you get the right one for
> the gauge of wire your connecting into.
>
> -- charles
>
>
> -----Original Message-----
> From: Jim Conforti [mailto:lndshrk [at] xmission.com]
> Sent: Saturday, April 11, 2009 2:34 PM
> To: Charles Perry
> Cc: The FerrariList
> Subject: Re: [Ferrari] More Stereo Installation & Wiring Expertise
> Needed
>
> Robert,
>
> This one is easy.
>
> Get a standard automotive relay - either a 4 pin or 5 pin Bosch Relay
> and a matching socket and terminals.
>
> The relay terminals are numbered.
>
> Terminal 85 should go to vehicle ground
>
> Terminal 86 should go to a any ignition-switched (fused) power.
>
> If when you turn the car on - the relay goes "click" you have that  
> part
> right.
>
> Terminal 30 goes to a (fused) source of constant power - like the
> current existing radio power.
>
> Terminal 87 goes to the radio power input.
>
> When you apply power across terminals 85 and 86, terminal 30 is
> connected to 87 and your radio turns on.
>
> A five pin relay will also have terminal 87a - which does the  
> opposite -
> it is connected when power to 85/86 is off - and disconnected when  
> it is
> powered up.
>
> Hope this helps,
>
> Jim
>
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