illumination on headunit, which wire?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=33146
Printed Date: July 09, 2025 at 7:20 PM

Topic: illumination on headunit, which wire?

Posted By: kmn5
Subject: illumination on headunit, which wire?
Date Posted: June 02, 2004 at 6:48 AM

I just installed a pioneer headunit in my SC300.

https://www.intellexual.net/faq/lexusstereo.swf
Shows TWO illumination signals one positive and one negative
(I confirmed this in my factory service manual)

But my aftermarket headunit (Pioneer deh8000) only has ONE wire for illumination.....
So which one do I connect it too? the positive or negative????

thanks
Ken

Replies:

Posted By: cd2478
Date Posted: June 02, 2004 at 7:43 AM

hypothetically speaking..positive..id presume it would ground itself through the head unit.

Posted By: mikedawg
Date Posted: June 15, 2004 at 3:37 AM

try them both out. hook up one and then turn on your headlights. if it dims, then thats the one

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always looking for new info and willing to give it

Posted By: kmn5
Date Posted: June 15, 2004 at 4:13 AM

Yeap tried both, nada :(

thanks for the replies though

Posted By: Peter0722
Date Posted: June 15, 2004 at 5:31 AM

[Ken,

Look in the menu on your 8000. You can turn the ill. control on or off in there. I had the same problem with my DEH-9000 until I found this option in the Pioneer menu.

Peter

QUOTE=kmn5]I just installed a pioneer headunit in my SC300.

https://www.intellexual.net/faq/lexusstereo.swf
Shows TWO illumination signals one positive and one negative
(I confirmed this in my factory service manual)

But my aftermarket headunit (Pioneer deh8000) only has ONE wire for illumination.....
So which one do I connect it too? the positive or negative????

thanks
Ken[/QUOTE]