That small wire where you found no voltage is supposed to have no voltage, ... Until a helper tries to crank the engine. By touching a wire to it from the battery and it cranks proves you found the inoperative circuit, but now we have to figure out why.
Every specialist needs the specific tools to do the job, and so do you. Poking and touching wires isn't going to cut it. You can find a perfectly fine digital voltmeter at a Harbor Freight Tools store if you have one nearby. They cost around $7.99 and often go on sale for $2.99. You can also use a test light, but they work best when testing for no voltage or some voltage. Sometimes we need to know not just if there's some, but exactly how much. On your car a test light can work fine for an experienced mechanic but most of us aren't used to seeing the slight differences in brightness. We'll start with a test light if that's all you have.
Sorry for taking so long to get back to you. I just skidded in from the nation's second largest old car show swap meet. Left here Wednesday evening. This shouldn't happen again until this time next year.
Monday, July 16th, 2012 AT 2:43 AM