Car Stereos: RCA input output converter, using a digital multimeter, 2004 toyota sequoia

Question
hey im driving a 2004 toyota sequoia with jbl speakers(stock). So i want to keep my stock stereo and my subs are located behind the third row seats(dont wanna take out the third row), i came across a problem when i realized that the rca converter has to be connected to a speaker and the closest speaker to where the amp would be is the rear door. The rear door is pretty far and i am concerned on how the installation would go and how it would be possible. Any help is appreciated thank you.

Answer
Hi David,

I'm not completely clear on what you're installing, but it sounds like you're adding an amplifier/subwoofer system to the JBL audio system in your Sequoia.  Is that correct?  

Getting behind the factory radio in your vehicle wouldn't do you much good in any case, because a Toyota with a JBL system always uses a factory amplifier.  The line-out converter should be connected to a speaker wire between the amp and the speaker.  If you're adding a subwoofer amp, then the ideal place to connect the L.O.C. is at the factory subwoofer wires.  Is it equipped in your vehicle?  If so, it should be located under the panel on the right side of the cargo area in the rear.

If you don't have the stock sub, then you can certainly tap into the rear speaker wires.  The distance isn't really an issue (except for the extra work involved, of course).  If I were doing it, I'd probably just extend the input wires on the line-out converter using ordinary speaker wire; it doesn't have to be very thick speaker wire at all.  You can route the input wires to the factory rear speaker wires in the B-pillars where they run into the rear doors.  This allows you to keep the line-out converter near your amplifier location if you wish.

If you're not sure of the color of your speaker wires, you can test for them using a digital multimeter set for AC volts.  A speaker wire will test with AC voltage that varies up and down with the volume of the music.  I'd always recommend testing a speaker wire before you make your connections; you don't want to mix it up with another wire, such as an airbag wire, which are sometimes found running into the doors.

Hope this helps!

Brian