1999 gmc suburban stereo wiring
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=94011
Printed Date: May 06, 2024 at 10:33 PM
Topic: 1999 gmc suburban stereo wiring
Posted By: edrath
Subject: 1999 gmc suburban stereo wiring
Date Posted: May 17, 2007 at 6:46 PM
I recently change the stereo head unit with an aftermarket 1.5 DIN Pioneer designed to fit this truck. I have not been able to get the rear door speakers to operate. I found a posting here from a few years back for a 1996 Suburban that stated there was an amp for the middle set of speakers. I found it under the dash. The posting also said that the pink wire would activate the amp. So, my question is, activate it how? I see a pink (or light red) wire in the dash harness to the head unit that is not used in the Pioneer. There are also two green wires that are not used. So, how exactly to I get the amp to turn on?
Replies:
Posted By: sqsq
Date Posted: May 17, 2007 at 11:28 PM
Assuming that the pink wire is an amp turn on (i'm not sure it is or not) you would want to get 12volts to it. Either hook up it to the blue/white wire on the pioneer harness (if it has one) or hook it up to the red accessory power wire on the pioneer harness.
Posted By: tcss
Date Posted: May 18, 2007 at 1:52 PM
The pink wire is indeed the amp turn on lead.
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Posted By: edrath
Date Posted: May 18, 2007 at 2:17 PM
Thanks to both of you. The aftermarket stereo adapter wire harness correlates the pink wire with the power antennea wire which I attached to the power antennea lead from the head unit. Works like a charm. Thanks again, Eric
Posted By: sqsq
Date Posted: May 18, 2007 at 8:59 PM
If the power antenna wire on the stereo harness is truly a power antenna turn-on you should know that it will only throw 12volts when using the am/fm aspects of your deck (so if you put in a CD those two speakers will shut off). If your deck harness has a blue wire with a white stripe, that is the one you want to use because it will keep the amp running whenever the deck is on. If there is no blue wire with a white stripe, it is possible the solid blue wire will always throw 12volts (since it's a power antenna turn-on it shouldn't, but sometimes they do) but if it doesn't, hook the pink factory wire to the decks red accessory wire and you'll be fine).
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