Thought about it but when I opened the window I discovered they were plenty loud.
Probably use the horn wires to energize a relay, and get fused 12V for the new horns from the battery.
I don't know if there is a horn relay or if the BCM operates the horns.
I have a 2014 TH, the only time I have used my horn is to scare deer.
Usually by the time I find the horn button it is too late.
Back in the dark ages I put a push switch on the floor near my left foot so I could blow the horn without using my hands.
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