Klarpsnarkle

oldracer,

Thanks for the reply. In the directions for the aftermarket wire harness (LC-GMRC-LAN-03) it says to connect the Orange/White wire to the illumination wire of the aftermarket Radio. I did this and discovered that it had no effect on the illumination of the unit. Upon closer examination I discovered that the pin of the Orange/White wire of this aftermarket connector is attached to pin # 2 of the 14 pin vehicle connector. Which should have a gray wire going off into the vehicle. As stated earlier, there is no wire , gray or otherwise, in #2 of this connector in my vehicle.

Klarpsnarkle

Here is the pin out of the connector in my vehicle. See link for pin locations.

1. Red/White
2. empty (supposed to be GRAY?)
3. empty
4. Dark Green
5. Light Green
6. Gray (LF Speaker out (-)
7. Tan
8. Black/White
9. Green/White
10. empty
11. Dark Blue
12. empty
13. empty
14. empty

https://www.chevyhhr.net/gallery/fil...diagram-p1.jpg

firemangeorge

That's the same as my schematic shows except #9. I have dk grn/wht.
And #2 gray wire going to the interior lights system.

Wiring schematics are not always dead on accurate. Some changes can occur during a cars production run.
Just not sure why you don't have that gray wire. There has to be a feed from the dimming system or interior lighting that is on that circuit. I mean, how else could the HU display dim if it was not tied to that circuit ?

Just a thought. Since there are 2 connectors, did you check the other connector for that missing "gray" wire ? The schematic shows that wire in connector 1, but who knows for sure.

donbrew

BTW, that seems to be digital signal wire, from the BCM that controls that sort of thing.

I suggest applying a hi/lo signal to the pin (#2). That is typically +5 0r less than +5, but may vary. A DVOM would be handy, especially since the ohm/continuity function applies a voltage.

firemangeorge

Just to clarify, this is where I got my info. May not be the same as what donbrew gave you( sorry I cut off the bottom, nothing important there)
I did notice mine shows #14 being white/blk , not gray like donbrew noted.

donbrew

Mine was from Mitchell. Can't vouch for it.

You figured out how to post a pdf? Please PM with instructions.

firemangeorge

I did a what to a pdf ?

Honestly, I'm not computer savy but I'll try to explain how I did it. I'll PM you later.(after I confirm with my wife, the one with the college degree in computerology. )

Klarpsnarkle

firemangeorge,

Thanks for the reply. One thing I did notice that was different from the diagram that donbrew provided is that on the one you provided, the gray wire on #2 does not terminate at the logic unit. All of the other wires continue on through X1 and are connected to the logic unit. #2 stops at X1 and says Dimmer SW Sig between there and the logic unit.

I sent Kenwood Tech Support a message and asked them what signal should be applied on the dimmer control wire connected to the radio. Not sure if I'll get an answer from them, but I figured it was worth a try.

firemangeorge

Let us know if you get an answer and/or figure it out. I'm curious and always willing to learn something I don't know the answer to.

Twistedtat

Not sure it would work, but could you tie the dimmer wire from the Kenwood to the wire on the factory dimmer knob on the dash?