thebug

If you have the new model you may be best off wiring to the battery anyway. As mentioned above there is an in-built system to prevent drain if they are left on, and I have found with the new model that each time I wired them into the ignition the switch failed within a couple of weeks. Or at least that's my current theory, as nothing else seems to explain the failure of two separate units after such a short time. My current set are wired to the battery and doing fine.