[bch]

Here's a start at documenting the connector pins for the radio. The single-CD radio should only have C1 and C2, while the 6-disc and navigation radios should have all three connectors.

I have drawings of the connectors that indicate which pins are where, but do not have a way to post them yet. Once I do I will update this with both that and a picture of the back of my 6-disc radio when I get a chance.

The first column lists the pin, the second contains the wire gauge and the color combination, and the third its function as listed in the service manual.

Radio C1 - Gray 10 way
Hands Free (U-Connect)

1    18LB/DG    LEFT AUDIO OUTPUT
2    18DG/LB    RIGHT AUDIO OUTPUT
3    -
4    18DG/YL    MICROPHONE FEED
5    -
6    18DG       COMMON AUDIO OUTPUT
7    18LB/DG    MICROPHONE IN (-)
8    18OR/GY    SENSOR GROUND
9    -
10   -

Radio C2 - Gray 22 way
Audio

1    18RD       FUSED B(+) (I.O.D.)
2    20WT       CAN INTERIOR BUS (-)
3    -
4    -
5    -
6    -
7    18GY/OR    AMPLIFIED ANTENNA FEED
8    18GY/LG    LEFT REAR SPEAKER (+)
9    18GY/DG    LEFT REAR SPEAKER (-)
10   18DG/LG    RIGHT REAR SPEAKER (+)
11   18DG/GY    RIGHT REAR SPEAKER (-)
12   18BK/WT    GROUND
13   20WT/OR    CAN INTERIOR BUS (+)
14   -
15   -
16   -
17   -
18   -
19   18DG/VT    RIGHT FRONT SPEAKERS(+)
20   18DG/YL    RIGHT FRONT SPEAKERS(-)
21   18GY/VT    LEFT FRONT SPEAKERS(+)
22   18GY/YL    LEFT FRONT SPEAKERS(-)

Radio C3 - White 22 way
Rear-Seat Video Montior

1    18GY/LB    AUDIO RETURN 3
2    -
3    -
4    -
5    18GY/BR    VIDEO SIGNAL 1
6    18GY/YL    VIDEO COMMON 1
7               VDO-VIDEO SHIELD 1
8    18GY/LB    VIDEO SIGNAL 2
9    18GY/YL    VIDEO COMMON 2
10              VIDEO SHIELD 2
11   18GY/OR    AUDIO RETURN 2
12   18DG/VT    AUDIO LEFT 3
13   18DG/YL    AUDIO RIGHT 3
14   -
15   -
16   -
17   -
18   18DG/TN    AUDIO LEFT 1
19   18GY/VT    AUDIO RETURN 1
20   18DG/WT    AUDIO RIGHT 1
21   18DG/LB    AUDIO LEFT 2
22   18DG/DB    AUDIO RIGHT 2

 

[bch]

It took awhile, but here are the images of the back of the radio and its connectors:

 

[bch]

Update to previous post. Installed the REN tonight and the C1 connector is there and fully wired. Now the BIG question is where do the wires go. When I had the rear interior torn apart I could not see the 22-pin connector but I did not remove the sub either. Nor did I see the connector for the rear view mirror in the headliner.

Time to hunt down this thing before I go crazy. If I have to take the vehicle apart I will. Going to wait for a free weekend and tear it down.

Hoping to get the Kickers delivered and installed this week and see how the system sounds. I don't expect a concert hall, but at least a little more than the Infinity's.

If I remember right from when I tore things apart a year ago, the C1 wiring behind the radio does not go far, only to C202 in the driver's side foot well. The wiring harness that runs between C202 and C313 on the rear quarter panel does not contain the wires to support the hands free module, and the harness that connects the module to C313 does not contain the wires or the connector to the module.