Thread: how-to: diy aux input for 04+ xm equipped cars

well my directions were for xm equiped cars so it should work just fine for you.

yup that should work just fine for the application.

anytime, and if you run into problems let me know, you only a hour or so from me.

yes, you need to ground on the audio common, if you still here the tapping, which will prolly go away when you change wire but you can ground the audio common to the xm box. but i would try moving the wire first of all.

idk what im doing wrong but I tried hooking it up and the first time the xm channel was stil going when i had my music playing. I was using the orange as negative(to audio common), and one of each red to left and right. what am i doing wrong? I took wire # 2, 3, and 10 from the connector. at one point when i was trying different wires the xm channel cut out and there was weird bass.

any help is appreciated thanks.


Brown: AUdio common
Black: Left audio
Strippedwire: Right audio


Red: Presumed Positive
Orange/yellow: Presumed Negative

Which ends did you cut off that cable?just the rcas correct?

And also the three wires you cut should never ever be hooked together 2 are posited and one is a ground. Looks like you have audio ccommon(-) to audio right (+).

Originally Posted by Jteske88

And also the three wires you cut should never ever be hooked together 2 are posited and one is a ground. Looks like you have audio ccommon(-) to audio right (+).

all i did was cut off rca's. so the 3 wires that I cut don't get hooked back together? they just attach to the new cable into the harness then plug in? in the picture my audio common is connected to audio common bc i thought i had to connect the wire itself back after cutting it in order to attach to the rca wire.

Jesus man it's written out for you. Why are u attaching **** to random wires

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Originally Posted by rperry435

Yup. I just took some rcas and cut off the ends. Green/white is right. Brown/white is left. Black/white is the common-ground.

For ex. Rca right was red and white. Left was yellow and white. Red and yellow are the left and rIght positive and the whites are common/ground just hook them together and then to the black white.

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Sent from my Galaxy SIII on Tapatalk 2

Obviously u didn't get a decent set of RCA's... using a set of cheap rcas LIke you have will only have different color ends. The internal wiring is usually the same colors for right and left so I wouldn't recommend them. I'd have to assume the yellow is the negative and red is positive on YOUR set of rcas. But follow the wiring I just posted above this.. there is no need to cut the factory wiring your just splicing onto them.

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Factory wiring colors

-They are at the rear xm receiver OR at the small plug on the back of your factory radio harness.

-Green/white is right.
-Brown/white is left.
-Black/white is the common-ground.



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well I just ruined a 25 ft rca to 3.5mm cable... at one point I had the right speaker working but that was it.
So I need to:

Connect left to the entire wire of brown, connect right to entire green wire, and connect both negatives to the black ground? weird how I only had one side working, maybe it was because the rca wires were like 26 gauge...but where do i find better wires?

I'd really like to get this working but not exactly sure what I was doing wrong. I know the first time I had the wrong wires but after that I was using brown, black, and green. maybe it was my rca's? really sucks i ruined that cable cause the aux was high quality.

correctnegatives to common, and left n right to left and right. sorry about the cord man

Originally Posted by sirricealot

well I just ruined a 25 ft rca to 3.5mm cable... at one point I had the right speaker working but that was it.
So I need to:

Connect left to the entire wire of brown, connect right to entire green wire, and connect both negatives to the black ground? weird how I only had one side working, maybe it was because the rca wires were like 26 gauge...but where do i find better wires?