aftermarket head unit 03 silverado
Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=114355
Printed Date: May 05, 2024 at 10:01 PM
Topic: aftermarket head unit 03 silverado
Posted By: smoker_98
Subject: aftermarket head unit 03 silverado
Date Posted: June 10, 2009 at 10:15 AM
Trying to install a new head unit in a 03 Silverado without Bose or Onstar. The truck had a kenwood deck in it already, so I am not sure of the wiring harness. Looks to be just a basic GM one. I hooked everything up to the new decks wiring harness and pluged her in and all I got was the cd eject mechanism to make noise. No lights, no sound. I am stumped, where can I start? I think a wiring diagram would help, but I need one for the truck side of the harness. Thanks!
Replies:
Posted By: Velocity Motors
Date Posted: June 10, 2009 at 11:51 AM
Check YELLOW wire on the deck for constant 12 volts and RED wire for switched 12 volts and test BLACK wire for ground. If all these are OK, then check fuse on deck.
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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: smoker_98
Date Posted: June 10, 2009 at 11:54 AM
Thanks Jeff! I found something online about needing to run a switched 12+ wire from the fuse box. Apparently the radio harness does not provide a switched power source??
Posted By: icearrow6
Date Posted: June 10, 2009 at 12:17 PM
Yep, these trucks don't have a switch 12v source.
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Posted By: smoker_98
Date Posted: June 10, 2009 at 12:24 PM
Cool, I've got that down. Anything else tricky I need to watch out for? Can anyone track down a wiring diagram on the truck side of the harness? I think the owner before me might have hacked some of the wiring up pretty good. Thanks guys!
Posted By: smoker_98
Date Posted: June 11, 2009 at 7:42 AM
Got the head unit in, I ran a 12+ wire from the under the dash. Thanks for the help all, I can not believe GM would not have an switched 12+ from the harness. Everything should still function correctly witht the way I wired this correct? Just no door chimes?
Posted By: yimke
Date Posted: June 23, 2009 at 2:18 PM
With the correct harness you should have no need to run ACC+ power. The correct scosche variant harness is the Lan2SR, which provides ACC+, door chimes, and RAP power. As well as maintaining the data line. Please verify that you have a correct harness.
GM did put ACC+ power in their radios, just not in the harness. The reason for this is many vehicles are advancing into single data line functions that do the purpose of 2-10 wires. More cost efficient and saves more weight.
If you have it run like you do, you will not have the Retained accessory power (RAP) feature or door chimes. This is sometimes not important to customers.
Unfortunately though for the data line, if this is a circular style data, then you could possibly lose vehicle features such as HVAC controls, interior door lighting etc.. Just make sure everything is working properly.
Otherwise if it is a star style data line, you are fine.
Posted By: sidewinder01
Date Posted: July 07, 2009 at 11:15 PM
You can ta from the ignition switch, the wiring color is orarnge ------------- FrAncIscO
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