I was wondering has anyone got a proximity sensor to work on a stock alarm. I think it should be pretty easy to install because all you need is the power and ground and tap into the negative trigger. Has anyone tried doing this? I was thinking of getting an aftermarket alarm, but it's basically the same thing, you get all the same features as a normal factory alarm, but more options like auto start, window rollup, and etc.. I just want to add on a proximity sensor or shock sensor. If possible, anyone have the helm's manual and maybe lookup the wiring diagram for the alarm?