I have a OHM/mutimeter etc. But don't know how to use it... My main reason for using it would be to check the electrical current to the selonoid of irrigation valves, to troubleshoot a break in the line, bad clock etc. What do I set the meter on? It has several setting ie. AC v DCv OHM x1k, I do understand the off button though Am I correct in thinking that all we need to do to check for power is ground blk and hot red and see if the meter reads a 7 or better. This is my guess but am not sure. Thanks.