I had a chance to pull everything apart again. I was able to use a wiring diagram another poster sent me. Unfortunately it did not have a perfect match to the actual wires so after putting it together best I could guessing on a couple of wires still no dice.

The 10-pin harness is labeled M40 on the diagram. here are the 10 wires:
grey
black
red/blue stripe
white
red
dark green
green/white stripe
yellow
orange/yellow stripe
mint green

The diagram shows the sequence as follows:
10.8[....]4.2
9.7.6.5.3.1

Now the $64k question is what color wire goes with what number slot? If you have the rosetta stone for that I won't be able to thank you enough!

1 white
2 black
3 green
4 red
5 green/white
6 yellow
7
8 red/blue
9
10 light green

My next idea is to find a pull-a-part or bone yard with a G35 in it and see if they'll let me get behind the stereo and either map the wires or simply cut out the 10 pin connector. I've also been thinking about going ahead and replacing the head unit and lean on crutchfield for technical assistance.

Any other ideas you can think of?

Thanks again for your help so far!

Modified by fatire_mtb at 7:00 AM 1/25/2008

Any help would be much approciated!

Thanks.

Don Lowry
dlowryjr@aol.com

In the meantime I came across a pinout of the 10 pin harness and the 6 pin harness, but I'm not confident that they are correct.

Primary harness with 10 pins
7 12v Memory (12V+)
1 12v Accessory (12V+)
5 Ground
2 Dash Lights
6 Dimmer
8 Power Antenna
3 Right Front Positive (RF+)
9 Right Front Negative (RF-)
4 Left Front Positive (LF+)
10 Left Front Negative (LF-)

Secondary harness with 6 pins
2 Amp Signal (12V+)
6 Amp Ground
1 Right Rear Positive (RR+)
3 Right Rear Negative (RR-)
4 Left Rear Positive (LR+)
5 Left Rear Negative (LR-)

Any idea whether or not these are correct?

Have you checked that other fuse yet?

Since then I have purchased the Grubbs dash replacement kit for an aftermarket stereo. When I hooked it up to test it I at least gained control of the HVAC.

Tonight I am going to attempt to put it all back together with an aftermarket stereo, IPOD connector and PAC SWI accessory so I can still use the steering wheel controls.

I can't thank you enough for the help you have provided so far. Any additional words of wisdom?

If you guys've fixed this, please help me out too. Thanks

I installed the Grubbs aftermarket dash kit and have the HVAC working again. With the help of crutchfield I was able to get the 10 pin connector back together and the stereo hooked up and the dash back together, but I must have a larger problem than a blown fuse or a loose wire.

Here's the list of problems. No dash clock lights. No power at all to the stereo. No response from the light dimmer switch. When I turn my headlights on my dash cluster and the heads up display that shows the HVAC settings go out. My compass is out and just blinks three dashes (this also goes out when I turn the headlights on). With the key in the ignition and the hood popped to check the fuses next to the battery I can hear some kind of high pitched hum, but can't locate the source of the noise. I checked all of the fuses and the fusible links, but they all appear to be good.

From searching around I would be led to believe that it is an issue with a fusible link being blown. Since they all appear to still be in tact I don't know where to check next.

Sanity check. Is the fusible link the entire black box of fuses next to the battery. Or are each individual fuse and the high amp fuses next to the battery each a fusible link? Can a fusible link appear to be good, but still not function properly?

Thanks again. Man this is a *****!

see if this helps.

http://www.crutchfield.com
bottom of the screen there's a link to

More Info:
Technical Support
Orange box "Search our online support center"
Search by keyword: 2004 G35

the search results will come up and you can pick from with Bose wiring diagram or without Bose wiring diagram

this will show you the ten pin and six pin connectors, the color wires and where they go in the connector harness, but be aware that the pin out #s on the crutchfield site do not match up with the pin out #s from the service manual.

I've got no parking lights, break lights still work. No dash lights what so ever, no clock lights, luckily i still got the compass and outside temp working, the AC on but couldn't control it. On this last attemp, I used the Crutchfield's guide, which helped a little. The Bose radio seems to want to work but that's about as much work as it does. This has been a frustrated 24 hrs and it won't be at least a week 'til I got a day off to take the car to the stealership. I don't know how nice your dealership is but mine wants 115/hr labor. Arghhhhhhhhhhh

Is this plug really that hard to pull out? What is with the sudden rash of problems here?

Thanks