I've seen the posts that people tapped the aux in to add another inputs, but I'm not exactly sure what was done. I understand which wires are which and everything, it's just a few of the connections I want to be clear on.

The way I understand it, you tap the left and right channels, that's easy enough.

Then they say to short wires 1 and 2 or 1 and 6. How should that be done? Do you just take a piece of wire and tap it to both 1 and 6 effectively connecting the 2?

Then do you have to do anything else? Are there any ground connections to make? I have wire, I have the stereo jack and I'm all ready to make my own cable to do this.

Once I understand for sure what I'm doing, I can hide my Roady aux out cable up under the dash!

Thanks for any help.

Bumping this up because I want to know this, too.

Me too.

Shorting the wires 1 and 2 tells the head unit to switch to AUX at the time of the shorting. According to the service manual:

Wire 1 (Yellow) is AUX-DETECT
Wire 2 (Blue) is AUX-DETECT-GROUND (well AUX-GROUND, but I assume it's for the detect only)

So, if the jack you install include an integrated switch which engages when you insert a cable (as the jack dash does), the integrated switch should be wired to these two contacts.

If not, don't. I *think* the head unit can be switched to AUX (and of course back out) manually. However, you can play with this while you are wiring to make sure that's the behavior.

Also:

Wire 3 (Brown) is Right signal
Wire 4 (Green) is shared signal ground
Wire 5 (White) is Left signal
Wire 6 (Light Green/Red) is supposedly for "shielding" of the wire between the headunit and the jack. Whether it is used in the manner, not connected, or just equivalent to another ground, I can't say.

-brendan

:idea: I know this isn't where you were heading, but I just bought a $6.00 Y adapter from the Shack (http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F007%5F002%5F003%5F009&product%5Fid=42%2D2570) and tucked it inside the trim piece that's on the dash just above the passenger-side Aux In.

The wiring has all changed now and is much neater. But you get the idea by looking at this picture. You can see what I mean by tucking the wires up underneath that trim... (yes, the glaring red/white RCA are gone!)

http://www.fullastuff.com/element/xm/XM_interior2_small.jpg

I then snaked the length behind the dash to where I needed and back out again on the other side.

I am running both XM and Sirius via this method with no unsightly wires visible anywhere to the people in my E...

No need to short, re-wire or dig any deeper into the dash either. Took literally 5 minutes and I was good to go!