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Key-free listening relay diagram

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epicminis 
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Member spacespace
Joined: March 06, 2003
Location: Georgia, United States
Posted: March 06, 2003 at 9:02 PM / IP Logged  
 Hi to all, i'm looking for a diagram that shows how to wire relays so that when you turn off your vehicle, the radio stays on until you open the door. I did this years ago, but have forgotten exactly how to wire the relays up. Any help especially a diagram would be appreciated!
cpgoose 
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Gold spacespace
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Posted: March 07, 2003 at 7:42 AM / IP Logged  
hey, I believe this is what you're looking for. I have no idea if it works or not, I'm just the messenger Key-free listening relay diagram -- posted image.
https://www.the12volt.com/installbay/forum_posts.asp?tid=9724&KW=radio+door+open
the12volt 
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Joined: March 07, 2002
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Posted: March 07, 2003 at 8:22 AM / IP Logged  
Key-free listening relay diagram -- posted image.
Key-free listening relay diagram -- posted image. the12volt • Support the12volt.com
the12volt 
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Posted: March 07, 2003 at 8:28 AM / IP Logged  

Edited: Just a note, to prevent other circuits that share the radio's accessory lead from seeing 12V+ when the key is off, cut the accessory lead and add two 1 amp diodes as shown below.

Key-free listening relay diagram -- posted image.

Key-free listening relay diagram -- posted image. the12volt • Support the12volt.com
epicminis 
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Member spacespace
Joined: March 06, 2003
Location: Georgia, United States
Posted: March 07, 2003 at 2:34 PM / IP Logged  

THANKS GUYS! That's what I needed. You guys RULE.

the12volt 
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Joined: March 07, 2002
Location: Louisiana, United States
Posted: March 07, 2003 at 2:50 PM / IP Logged  
You're welcome, however, my second diagram has a problem. If the key is on, the radio will turn off when you open the door. I'm about to head out , but as soon as I get the chance, I'll post an updated version here.  
Key-free listening relay diagram -- posted image. the12volt • Support the12volt.com
the12volt 
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Administrator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 07, 2002
Location: Louisiana, United States
Posted: March 07, 2003 at 4:11 PM / IP Logged  

Here's the fix to isolate the radio frrom anything else on the same circuit without it turning off when you open a door with the key in the accessory position.

Key-free listening relay diagram -- posted image.

Key-free listening relay diagram -- posted image. the12volt • Support the12volt.com
themagicone 
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Joined: October 01, 2002
Location: United States
Posted: March 07, 2003 at 4:37 PM / IP Logged  
there is also a solid state eltronic chip you can use 525 timer or something like that, search around.

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