Stock receiver wiring help

[Ray Fiset]

This is my first post here, I have used the forum to look up information on the last two trucks I have had and had pretty good luck but I cant seem to find anything on my current issue.

I am removing the stock audio system from my 94, Control head, Receiver and cassette deck, to install an aftermarket system. I have everything out and have a pretty good handle on the wiring I will need to use however there is one thing that has me baffled. I do have a wiring diagram from a Haynes manual.

Coming out of the plug in the receiver that goes to the control head is a separate white wire that connects to a green wire in the main dash harness with a black connector shown in the picture. What is the function of this wire, it's not on my wiring diagram.

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[HotWheelsBurban]

Clock? Cause that would be separate since it needs to be hot all the time. My best guess anyway!

 

[east302]

The 94 service manual can be downloaded here:

88-98 Service Manuals

Over the years I have collected a bunch of GM service literature. Links to PDF Scans of service and STG manuals and a links to the Parts manuals. You'll need the FREE Adobe Acrobat reader to open these files. Get it directly from Adobe here {http://get.adobe.com/reader/} If you're not...

www.gmt400.com

The only radio diagrams are these, maybe it’ll help. There are other schematics (not wiring diagrams) that show connector views and locations.

One possibility - they all show a wire to the data link connector.

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[Ray Fiset]

Thanks east302.
I see the DLC connection, it shows DK GRN which is the color of the wire that the white wire in question connects to so could be a possibility. I'm going to check out the link you supplied for the manual and see if I can dig out any more info.

Thanks for the reply

Cheers from Vancouver Island