2003 silverado horn relay input wire location
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URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=140402
Printed Date: April 28, 2024 at 7:42 PM
Topic: 2003 silverado horn relay input wire location
Posted By: chiefgeek
Subject: 2003 silverado horn relay input wire location
Date Posted: December 26, 2015 at 4:11 PM
Can someone point me to the location of the horn relay trigger wire for 2003 silverado?
I added a secondary horn with a relay and tapped into the green wire at the existing horn to trigger the relay, problem is that when you lock the via keyless remote twice you don't hear the horn at all. I assume it is because I am going through 2 relays and the circuit is not live long enough to trigger both relays.
Replies:
Posted By: Ween
Date Posted: December 26, 2015 at 6:19 PM
Thin black at steering column or BCM. https://www.autozone.com/repairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f8025edab
Posted By: chiefgeek
Date Posted: December 27, 2015 at 8:49 AM
Ween] wrote:
Thin black at steering column or BCM. https://www.autozone.com/repairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f8025edab
Thanks, I didn't make it very clear, but I was hoping to find it under the hood so I don't have to run a wire through firewall.
Posted By: Ween
Date Posted: December 27, 2015 at 9:17 AM
Well then, at the fuse box under the hood. Connector C1, position C3, might even have the two thin black wires as the schematic shows. Should be able to determine the pinout of the horn relay in the fusebox with a multimeter, then continuity of that terminal to the underside of the fusebox. Or just probe the terminals with a thin black wire(s) that show 12 volts that then go to ground with the horn operated.
Posted By: chiefgeek
Date Posted: December 27, 2015 at 11:35 AM
Ween] wrote:
Well then, at the fuse box under the hood. Connector C1, position C3, might even have the two thin black wires as the schematic shows. Should be able to determine the pinout of the horn relay in the fusebox with a multimeter, then continuity of that terminal to the underside of the fusebox. Or just probe the terminals with a thin black wire(s) that show 12 volts that then go to ground with the horn operated.
I swung the fuse box up and probed under relay and fuse and got totally confused seems like the wire directly beneath the fuse and relay are not actually connected to the fuse and relay. Is that even possible?
Posted By: Ween
Date Posted: December 27, 2015 at 4:12 PM
yes
Posted By: chiefgeek
Date Posted: December 27, 2015 at 6:06 PM
How do I find position c3?
All I have to go on is this image
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