Aftermarket sound system wiring question

[ptralx]

I have a 2008 quad cab 4x4 with the "premium" sound system and NAV. I am working on a sound system upgrade that includes all new speakers (CDT with Image dynamics sub), a new JL audio 600/4 and a clean sweep. I also added sound deadening materials to the doors and floor. What I thought might take a weekend and a couple of evenings is pushing 3 weeks. I am 99% done but I have one question that hopefully some one here has already figured out the answer



I need to tape into a "switched" line for the power of the aftermarket equipment. I want the new system to act just like the stock system so that when you turn the key off, the radio stays on until the doors are opened. Where is a good place to tape into this "switched line"?. I have a wiring diagram but can't quite figure this out.



Thanks for any answers, once I am done I will post what I have learned from the whole project and about how much beer you should stockpile if you are taking on a simular one

 

[JEstes]

Are you using the stock head unit with this? With either the stock or aftermarket head unit, there's a remote wire that is used to turn the amplifiers and head unit on and off. When I installed my aftermarket system in my '03, I bought a premade wiring harness to mate the new head unit with the stock wiring harness.

If you're using the stock setup, you should be able to unplug the connector and play around with a multimeter and see which one is the remote wire. It will be +12 volts. I don't remember what color the stock one on my '03 was, but blue is the general color.

 

[p-Bar]

pull it off of the radio hot (switched on/acc)