It's not BMW envy but I saw a BMW the other day that when he was going to make a pass he honked his horn and it also made the Aux light flash. I thought that was pretty sweet and an extra level of visibility. Before I start hacking wires I was just wondering how it would need to be wired. I don't want the opposite to happen. I don't want my horn to start honking ever time I switch on my Aux lights... Any ideas of how to wire this would be appreciated..