Have you used the search here?? Somewhere here is all kinds of wiring dia. for all pocket bikes. Search: APC Mini Chopper Electrical Diagrams, a bunch of posts for wiring should show up. Plan 2, online, to sdscooters in Texas, click on the Tech Page button, there are many electrical wiring dia. for PB. The engine runs on its own, that toggle switch is hooked to the frame, when you throw in On, it grounds the coil and the engine stops, just like a chainsaw, its just a gas backpack blower engine. Don't need a key or battery, to ride it, get it running and fix the wiring later. First check for a spark with the plug out and grounded to the engine, pull start it do you have a spark, if so, put a teaspoon of gas down the spark plug hole, put it back, see if it pull starts. If Needed, turn the carb piston open & put some gas in the piston hole, try pull starting again. If you have more than 100lbs. of cyld pressure & a spark, and gas, it should at least pop or try to start. Everyone of my bikes has a kill button on the handle bars, even if it has an Ign. key, I get handle bar kill buttons for $2.50 ea. USD, free shipping direct from China. Also on eBay, search, mini chopper 49cc pocket bike parts, all the 49cc P/P engine bikes have the same engine and many other parts.