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    Default Horn Circuit Question

    I installed an Air horn on my truck, at the same time I installed a compressor, solenoid valve, horn relay, and a push button switch. Currently it is not wired into my vehicle horn relay, and that is what I am now trying to do. I am trying to contain the wiring to the inside of my cab. I have put a multimeter on 3 different wires that I think go to the horn switch and I get no voltage. When I look for a schematic for the horn circuit all I find is for a 2003 Silverado, my truck is a 2007 Silverado, I would think that the schematic would be close. The question that I have is; Does the wire running from the factory horn relay going to the horn switch have 12 VDC power or is this a negative wire just providing a ground. My current wiring schematic for the air horn is set up as required for the Wolo Solenoid valve and I want to run a jumper wire from my horn switch wire to the back side of my air horn so that when I hit my regular horn the air horn goes off as well. In order to do this I need the 12 VDC to open the solenoid valve.
    Attached Thumbnails Attached Thumbnails 2003 Silverado Horn Circuit.jpg  
    Last edited by Macattac3572; 09-04-2012 at 04:40 PM.
    2007 Silverado LT Z71 Crew Cab w/Diablo Trinity
    2.5" Front leveling Kit, Removed 1" factory Rear Blocks, Installed 2.5" Blocks
    CSI CAI, Rugged Liner Tonneau Cover, EGR Bug Shield
    EGR In-Channel Vent Visors, Front Windows Tinted 30%
    275/70/18 Goodyear Wrangler Duratracs (33's)
    Spec-D LED Taillights

    Wanted - Gibson or Magnaflow Exhaust, Nerf Bars, Spyder Black LED Projector Headlights

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