CD changer plug pinout, 97 EB w/Premium & sub

[Eric in Wyoming]

Hi errbody!

By golly it's been awhile! I'm on my third OEM radio, and it now fails to read cassettes or the adapter I use to plug into my phone for YooToob playlists. I'd like to wire a headphone jack into the plug so that I can just switch off the CD changer signal and feed a signal from my phone through the existing CD changer harness - is that possible? Where could I find the pinout for the plug going to the changer?

Thanks in advance, yall!

 

[Eric in Wyoming]

So I found this thread, which gives me some hope!

Aux Auxillary Input 1998 Navigator / Expedition 3.5mm

Hi All. I responded to a thread in the Audio section with this info but I though someone here might find it useful. I have a 1998 Navigator with a CD Changer and a cassette player in the dash. I don't use the CD Changer and I am used to listening to music from my phone in the car. I want an...

www.expeditionforum.com

That thread also led me to this thread, which includes a switch in the wiring to go between the auxiliary input and cd changer.

Aux Input to a Stock 2006 Expy Nav Unit w/o DVD

So I said I was going to do it - and I did here are some photos and a how to. So the basics are I wanted an AUX input for MP3 and DVD (netbook computer that sits on the middle console/armrest) so I decided I would find a way. The basics are this - if you have rear seat audio control with...

www.expeditionforum.com

So now I wonder - since the auxiliary input has a common ground, can the two channel ground wires in the wiring harness be spliced together with no ill effects? If so, then I can just use a 3-conductor switching jack instead of that big 4-pole toggle switch. If not, then I'd just use the toggle. Unless I can find a 4-conductor switching jack....