Some people may have seen this on the web, some may have seen it as a Bonus item on the Employee of the Month DVD, but I want to mess with a friend of mine by hooking up his horn and his brakes. eg, every time he brakes, the horn goes off. We both have a 2003 Yukon XL. I just need to know where to start poking around so I can set this up for April 1st.
Thanks in advance!