After we ran the 12-gauge wire for the compressor from the pressure switch to the battery, we ran the two wires for our toggle switch. We opted to mount it on the side of the center console for a stealthy and easy-to-reach location. Now all we needed to do was try the horns. We recommend earplugs, really. To hear the horns we installed, go to truckinweb.com and check out the video of us scaring the SoCal public.
HornBlasters Train Horn Kit Installation - Attention Getter