All due respect, but if you can't distinguish a ground, when to use a socket swivel, or use a meter, I recommend you take it to a reputable shop or dealer. Could save you lots on money and anguish in the long run, and you can refocus on the business end of the hook sooner.
However, if you insist, you can find the service manual on your motor on CD on Ebay, and they can prove quite handy. I have one on my 1991 Mercury 115 that I look thru from time to time, and personally I consider it priceless.