Numerous posts in various forums mention checking the electrical hookups at RV parks with a multimeter before plugging in to determine ??? I was in a hardward store a few days ago and saw a digital multimeter on sale and purchased it. Now, after reading all of the instructions, I've absolutely no idea how I would use it due to all of the settings. I have black and red electrodes and 3 places to plug them in. One plug in is a common/ground. There are settings for DCV, ACV, DCA among others. I realize this is one of those dumb questions, but, how do I use this thing and what sort of reading am I looking for? Help needed for electronically illiterate newbie. I do not wish to electrocute myself and give my DW all of my life insurance. :question: