Instrumental said:
So, how do you fix the XM bleed? Don't leave us hanging!
Since you posted the Original thread on this Forum you'll know from my short version what's happening
http://gmtnation.com/f93/$3-00-aux-input-via-xm-interface-1722/
Let's try this again.
There's a few reasons XM bleeds into the signal and or some people get buzzing or alternator whine.
Some had no problem at all no matter how they hooked it up.
But, the main reason for the XM bleeding into the signal with the 5 point Radio Shack 3.5 mm jack is when SPLICING all the wires from the 5 point Radio Shack 3.5 mm jack into the designated XM Harness wires.
The H wire needs to be SPLICED into to get a good Ground.
But SPLICING into the other 2 wires in the XM Harness will Blend the Aux device signal with the XM signal.
By only SPLICING into all XM Harness wires, the XM signal still goes straight into the radio.
So, those other 2 wires in the Harness need to be CUT!
The 5 point Radio Shack 3.5 mm jack is a switching jack and shuts off the XM signal when the Aux device is plugged into it.
But,.. it doesn't work if All the wires are SPLICED in the XM Harness.
To stop the XM bleeding into the Aux device signal, again, the other 2 XM Harness wires have to be CUT and the 2 & 3 wires and the 4 & 5 wires from the 5 point Radio Shack 3.5 mm jack need to be unwrapped and made single wires again.
Then each end of the CUT XM Harness wires has to be connected to it's designated wire respectively to the wires coming off the 5 point Radio Shack 3.5 mm jack to complete the circuit.
This way the XM signal goes Through the 5 point Radio Shack 3.5 mm jack, ... let's say, IN at point 2 and OUT at point 3, and the same for 4 & 5, .
Now, by Plugging the Aux device into the jack, it activates the switch and stops the XM signal at the 5 point Radio Shack 3.5 mm jack so only the Aux device input signal gets to the Radio.
If you want to listen to XM, unplug the Aux device and XM works like normal.
If someone doesn't care about XM, the 5 wires can be attached per your directions but you still have to CUT the other 2 wires in the Harness.
But now leave them cut and attach the 2 sets of wrapped wires coming off the 5 point Radio Shack 3.5 mm jack to the XM harness wires leading to the Radio and leave the other cut end of the wires in the Harness coming from the XM Module open, not attached to anything.
Also, If you don't care about XM, there's a 3 point Radio Shack 3.5 mm jack ( 274-249 ) that can be used to set it up that way and only need 3 wires.
As far as the buzzing and whine, again not everyone had this problem even when wired wrong ,but they changed the XM station until the buzzing went away.
Other buzzing came from certain I phones and the charging of the phone caused buzzing etc.
I'm not up on all the Phone info but it did vary and not every had that problem for whatever reason.
Hope this helps
