If you buy Darryl's system, it'll come with instructions telling you how to wire them up. It's very easy. Darryl was kind enough to supply me with a set of instructions even though I haven't bought a kit (experimenting with my own systems as you all know!). IMO this is a better solution than using the door heater wires. Martin #1458 > > Next Question. I'm going to do the door-latch actuators from Darryl. Do I > have to run wires for his actuators? or can I use the LGW that the Zilla's > schematic shows running to the door for the proposed mirror heaters.