Key positions for my 1966 DT175?

[Young Gun]

There are four key positions possible on my bike. Before I started to disassemble I had checked the lights and think both the front an rear lights are shot but the horn works fine. I would like to figure out if I simply had the key position in the wrong place considering it has four possible placements. Does anyone know the four key positions for the DT175?

[scrambler]

1. off
2. everything but head light and taillight
3. everything
4. taillight only

[reed]

Scrambler
On 4 taillight only, is that a parking light so you can take the key out and the rear light stays on!
Thanks.
Steve.

[scrambler]

[Young Gun]

Thanks a lot! That is really helpful. I just can't wait till the warm weather comes. My Jeep burns fuel like its free!