Position -1: Grey connects to Black and Yellow (tail light and pilot light run off the battery). Green is connected to Pink (engine kill)
This system allowed a DC model to have emergency lights if the engine stopped running, by switching the key to the -1 position. The brown wire, which goes live in the 3rd setting was AC power from the engine, so when headlight was required, the headlight and tail light would operate AC at that point. The horn, and brake light also ran DC on these models, but their power was direct from the rectifier (horn) or jumped off the grey wire at the brake pedal switch.
So wiring works out this:
Normal Feeds are:
12v Gel Battery that will fit late series 2 and all series 3 and Gp/Dl scooters..
6v Battery that will fit late series 2 and all series 3 and Gp/Dl scooters.
Ignition Switch by Scootopia with Osam marked on it, c/w numbered keys, very well made and as original....
Stainless steel end can / muffler for Franspeed / Jl exhaust systems.
Piston stop tool, universal for Lambretta & Vespa. long version.
Front sprocket dish washer for Lambretta J + Lui (3 speed models) Casa Lambretta B355