[jr_ss]

From what I see, there are 6 wires on your ignition switch.

Pin 1 is a White wire, that's your power feed to the switch.
Pin 2 is a White/Blue wire, that's ACC power.
Pin 3 is a Black/Red wire, that's On-Start power.
Pin 4 is a White wire, that's On only power.
Pin 5 is a Black/Yellow wire, which is the Start/Theft power feed.
Pin 6 is a Black/White wire, which is a power feed to a 7.5A fuse.

Do you have a picture of said wire? Is it a heavy gauge wire or a rather light gauge? This could shed some light on the subject. Are you sure it's a Black/Green wire and not a Green/Black wire? The first letter or color code is the wire color, second is the stripe color. If there is no stripe it is a single letter.