what is a good "switched 12V" source in a car? | TigerDroppings.com

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guedeaux
LSU Fan
Houston
Member since Jan 2008
10437 posts

what is a good "switched 12V" source in a car?


I am installing an mp3 adapter to my car radio, and the power needs to be hooked up to a "switched 12V" and not a "constant 12V" source. By good, I mean easy to access.

Alternatively, can I splice it into the power source for the radio itself?

TIA








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fightin tigers
Downtown Prairieville
Member since Mar 2008
20557 posts

re: what is a good "switched 12V" source in a car?


if you have a cigar lighter that turns on and off with the key that is what I would use. also if you havea power antenna there is a line off the back of your radio that should be labeled.





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guedeaux
LSU Fan
Houston
Member since Jan 2008
10437 posts

re: what is a good "switched 12V" source in a car?


quote:

if you have a cigar lighter that turns on and off with the key


yeah, I have one right next to where I am installing the fm mod. do I just splice the wire into it or do i need an adapter of some kind?






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fightin tigers
Downtown Prairieville
Member since Mar 2008
20557 posts

re: what is a good "switched 12V" source in a car?


I usually just splice the wire, butt splice. it is small, like 18 gauge to it makes it hard to do some sort of pinch adapter.


This post was edited on 2/8 at 2:02 pm


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guedeaux
LSU Fan
Houston
Member since Jan 2008
10437 posts

re: what is a good "switched 12V" source in a car?


quote:

I usually just splice the wire, butt splice. it is small, like 18 gauge to it makes it hard to do some sort of pinch adapter.



Thanks, I'm gonna give it a try tonight and see how it goes.






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fightin tigers
Downtown Prairieville
Member since Mar 2008
20557 posts

re: what is a good "switched 12V" source in a car?


make sure you have a cigar lighter that turns off with the key. usually a phone car charger will let you know.





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piratedude
LSU Fan
baton rouge
Member since Oct 2009
1034 posts

re: what is a good "switched 12V" source in a car?


if your radio is aftermarket, it probably has an power antenna lead which will work perfectly.





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TigerWise
USA Fan
Riverboat Hallelujah
Member since Sep 2010
18822 posts
 Online 

re: what is a good "switched 12V" source in a car?


Just use a T tap off of the radios switched wire.





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TigerWise
USA Fan
Riverboat Hallelujah
Member since Sep 2010
18822 posts
 Online 

re: what is a good "switched 12V" source in a car?


quote:

if your radio is aftermarket, it probably has an power antenna lead which will work perfectly.


This will only have power when you turn on the AM/FM radio.






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SpqrTiger
LSU Fan
Baton Rouge
Member since Aug 2004
5718 posts

re: what is a good "switched 12V" source in a car?


This is the strangest OT thread I've ever seen.

Every post has been helpful with no bull shite.

Except this one.

Piihb/diaf/gtfo/gfy.

Germans.

There. Now it fits in.







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guedeaux
LSU Fan
Houston
Member since Jan 2008
10437 posts

re: what is a good "switched 12V" source in a car?


quote:

if your radio is aftermarket, it probably has an power antenna lead which will work perfectly.


its a factory nav system/stereo






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LSUAlum2001
LSU Fan
Tier BP
Member since Aug 2003
27458 posts

re: what is a good "switched 12V" source in a car?


quote:

Alternatively, can I splice it into the power source for the radio itself?


Yes.

Ignition switch controlled 12V supply to the radio.






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piratedude
LSU Fan
baton rouge
Member since Oct 2009
1034 posts

re: what is a good "switched 12V" source in a car?


quote:

if your radio is aftermarket, it probably has an power antenna lead which will work perfectly. This will only have power when you turn on the AM/FM radio.


never mind, you're right.







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TigerWise
USA Fan
Riverboat Hallelujah
Member since Sep 2010
18822 posts
 Online 

re: what is a good "switched 12V" source in a car?


If you want to make it really easy go buy a wire harness from a shop has if you were going to put in an aftermarket radio. Plug the aftermarket harness into the factory radio harness in the car. Since the aftermarket harness has all the wires labeled you can easly trace the wire back to the factory radio's side and just tap into the switched wire. Then just return the wire harness when done.





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