DIY: Standalone Starter Killer

This is a stand alone starter kill. It does not rely on an alarm or keyless entry for it to work, only a simple momentary contact switch (normally open) to deactivate it. Every time the ignition is turned off, continuity is broken on the starter feed wire. To disable (or start), turn ignition on, then press the hidden switch, then start as normal.

Materials Needed:
2 Relays
1 Momentary Switch (normally open)

Entire Idea STOLEN from with a re-drawn diagram