2004 silverado ext cab horn wire

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=90373
Printed Date: May 05, 2025 at 10:11 AM

Topic: 2004 silverado ext cab horn wire

Posted By: grissomb
Subject: 2004 silverado ext cab horn wire
Date Posted: February 12, 2007 at 7:35 AM

I am installing an aftermarket alarm/remote start and I am undable to locate the "horn" wire coming from the top of the steering column. I have removed everything from the column to make sure I didnt overlook it. It appears that I do not have a "BLACK / YELLOW" wire. I do have a solid "Black" wire though. Any thoughts on this? I have isolated the horn down to one specific harness, but I am not exactly sure how to test for the horn. Thanks for yoru help.

Replies:

Posted By: mikvot
Date Posted: February 12, 2007 at 7:56 AM

Black at bcm below steering column in grey connector.

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Posted By: grissomb
Date Posted: February 12, 2007 at 9:03 AM

Thanks for that info mikvot. I do have one more quick question regarding this install. The question is in regards to theTach wire. I connected it to the white wire that is in the plug that plugs into the Instrument Cluster that is in the dash. Is this correct?

Posted By: mikvot
Date Posted: February 12, 2007 at 1:42 PM

Yeah,i think there is only one white wire so it should be correct. No way to know for sure without testing the wire with a dmm. Also, make sure you power up the white second igntion of the vehicle with your remote start.

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Posted By: grissomb
Date Posted: February 13, 2007 at 8:30 AM

Well, It looks like so far I have everything correctly connected. I do have one last question regarding the wiring. It does concern the remote start. I purchased a Bulldog Security T-Harness that is vehicle specific and has the following wires coming from it:

< face=Arial color=#000000 >(2) red wires are 12 volts constant.

white is ignition 1

WHITE/ red is ignition 2

WHITE/ black is acc.

yellow/black is starter

On the alarm system, it says the following for the yellow wire: < face=TT55CO00>

YELLOW < face=TT565O00>: +12V Ignition Input. The Yellow wire must connect to a main ignition wire at the ignition harness. This wire must show +12V when the ignition is on and while cranking the starter. The voltage must not drop when the car is starting

< face=TT565O00>So I should connect this yellow wire to teh Ignition 1 wire, correct? Or should it be the Yellow/black wire?? I am a little confused on this one. Thanks for your assistance once again. I am pretty sure it connects to the yellow/black wire now that I think of it....

Posted By: b2reptile
Date Posted: February 13, 2007 at 9:21 AM

From the info you have given, the Yellow +12V Ignition Input Wire should connect to the White Ignition 1 Wire.

Posted By: flobee4
Date Posted: February 13, 2007 at 9:24 AM

You connect that yellow wire from the alarm system brain to either ignition 1 or ignition 2 (so, the white wire or WHITE/ red wire coming from the t harness) This yellow wire lets the alarm know the car is started so the alarm won't set on you while driving.

Frank