The Key1 wire goes to one of the Canbus wires.. I had to extend that wire and run it over to my steering column on my WJ Cherokee.
It had the infinity system, but it was not canbus controlled back in 02. My 07 WK is canbus controlled. I believe all of them are.
On my WJ I only had one of the Key wires connected, I did not need 2. I think this extra wire is for non Canbus (resistive) systems.

My 07 WK Cherokee has a canbus controlled amplifier, and had no speaker wires going to the amp. It has a Boston Acoustics system.
You should be able to use the canbus wire that controls the amp, which is already part of your factory radio harness to connect to the Canbus system.
You shouldn't need to run a cable to your steering column on the 05-10.

Since Canbus transmits everything on the single wire any canbus wire you can locate should work.
The Ground wire is just a ground, they specify it should be a ground that your steering controls share, since some vehicles use a resistance
based button system. I just spliced my ground to the radio ground.

Here is a pinout for the factory harness.
http://www.wkjeeps.com/wk_audio_pinouts.htm

Another thing is you didn't specify if your using a PAC or similar adapter. If you are that will affect things
a little.

BTW: I installed a Eonon 2110 Android in my WK, very similar to the pumpkin.
http://www.jeepforum.com/forum/f22/johnny-5-build-3645210/#post34421601

 

hi, sorry to revive this old post, Is the wire of the wj steering coloumn red and yellow? that goes to key 1 on the android radio? thanks

 

Its been 4 years since I quit driving my WJ, still have it in a garage, needs some motor work. But.. I was able to find this info..
http://wjjeeps.com/steering_sw.htm
http://wjjeeps.com/radio_remotediag.jpg

The wiriging diagram (2nd link) for the remote radio controls located on the back of the steering wheel say Red with Yellow as being the wiring for those controls.

Also, anytime you are working with wires in the steering column, be aware that the airbag wires are located there are well.

 

thanks for your help find it out anyway on a youtube video, the only thing is this andoird radio i have has 2 cables key 1 and key2, in another post i read key 1 is the one for that red/yellow cable, but what about the other key 2 does it need to go ti another cable?

 

hey there,
just installed a new Joying 11.6 Inch Android 10 unit.
i have wired the Red/yellow wire to the key1 and/or key2 wire and only a few buttons work.
currently my radio only sees left up left middle and right middle button. all others are not recognized. tried both key wires and also both at same time. it is really annoying. anyone know a fix? i have measured and each button gives a different voltage. also, does the car have a can wire for additional info? or am i doing something wrong? its pretty bad given thst this unit is all touch, no buttons there..