I have a 1956 Simplex Automatic with the switch shown in the picture. I have installed a Predator engine on it and I am now trying to configure the lighting and ignition to work with the original switch. I am absolutely confounded by the switch connections.

I plan to use a rechargeable battery to run the lights. I assumed that if I put a continuity tester on the ground terminal and then the other various terminals of the switch, I would be able to determine how to make my connections. The only continuity result I can get is on the ignition terminal. Said differently, I can put the tester on the ground terminal and the first terminal counter-clockwise and can open and close the circuit by moving the switch back and forth from off to the first position. I assume this is where I would put my engine Kill-switch wires.

However, I cannot figure out any way to get continuity between any of the other terminals in any of the key positions. How can I introduce a battery and lights to this circuitry?

I'm a newbie to this site having just traded a 1952 Cushman 700 series for a 1956 Simplex Automatic. I'm not new to scooters having had a succession of Lambrettas, Vespas, [Hondas] and several Cushmans, most of which I rebuilt/restored or modified significantly.

My Simplex is a beauty that had been sitting idle after a 2000 restoration.  A new carb and some cussing got it running as well as they apparently will, but not enough to accelerate my 175lbs comfortably into neighborhood traffic to make coffee runs…pub crawls are out of the question.

With help from Wayne Mahaffey, I'm now embarking on an engine upgrade to a HF Predator 212 cc (racing engine) which I'm told promises 50 mph. My question is how to handle lighting.  I'm yet awaiting the engine remount kit from Wayne, so I don't know what the native Predator electrical system will do.  I'm considering replacing the bike bulbs with 12v LEDs and wondering if the Predator has any electrical output that will power those low amp lights...I doubt it.  If not, what are my options?

I could go with a detached rechargeable battery, but I hate the extra nuisance of always recharging a battery. Are there small generator options and what are they?  Thanks.