Panko 2,481 Posted December 25, 2014 Hi guys, After having the XF broken into twice in the space of a few months a couple years ago, i bought i high end alarm system, with remote locking, but have never installed it. So my first and main question is, does anyone know if the central locking in an xf is positive, or negative power to fire it? The instructions say i need to know, and wire the remote locking in the correct configuration to make it fire correctly. Second of all, are they easy to install? Share this post Link to post Share on other sites