adding subs..... no aux output on the back of factory radio!

[ess3489]

got my sub and amp inlace just needing to run the aux red and white wires from the back of the head unit to the amp...... got my dash apart only to see that there is no aux output for these wires to plug into!?!?!?! what do i do how to i get sound to the amp? i had the stock powered 8inch sub behind the rear seat curious if i can use those wires to send the sound signal to my amp or do i need to by some type of converter?

[TheFordman87]

Go buy a converter is the easiest way. It hooks up to any speaker or mutiple but as long as you tie front/rear wire together then hook obviously posative and negative up on one of the speakers and plug RCA wires and enjoy

[ess3489]

tie front and rear wire together? can i use the wires are the back that were going to the stock sub? if so which wires going to the stock sub are the speaker sound not ground, remote, or power?

[TheFordman87]

I have never used factory sub port before but I believe they run straight off speaker wire and not RCA wires. You would be better off just buying a converter box. And by front and rear I mean on the converter box there is a front and rear or right and left and unless you plan on running to more than one speaker just tie them together so both red and white (left/right) cable get signal

[TheFordman87]

NEW CAR AUDIO RCA LINE-OUT CONVERTER W/ REMOTE TURN ON HI-LOW SPEAKER to RCA NEW on eBay!


This will give you an idea of what I'm talking about

[ess3489]

yea there is no rya wires to the stock sub just speaker wire. but what I'm asking is if i use that converter to tap into a speaker it seems easy to tap into the speaker wire running behind my rear seat to the factory sub instead of messing with getting my head unit and dash off and taping into the speaker wire up there in the dash. maybe I'm way off

[TheFordman87]

The easiest way is to tap into one of the wires directly on one of the speakers. So just pull a door panel off. It's very easy. What year truck do you have?

[ess3489]

2009 fx4 crew cab.

[TheFordman87]

Your best bet is take off one of the front door panels tie into behind the speaker then run the RCA through the rubber casing where the factory wires run

[ess3489]

thanks ill give this a try