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Message: <blockquote data-quote="ttocs" data-source="post: 1507844" data-attributes="member: 11896">narrowing down which wire is which is what the meter is good to help with.  There are a few ways to do it and sometimes you don't even need to see the meter if it has the diode check option.  The symbol for a diode is a triangle/arrow with a line on the end of it and sometimes it will also have a little audible/speaker symbol as well.  If you put the meter selector on it and then touch the test leads together the meter should/will make a beeping noise to tell you that they are touching.  Just stab the wire on one side and then get the lead to the other(you might need an extension wire) and then start testing wires on the other side till you hear the beep.After that the resistance/Ohm meter is another great way to test but you will need to see the meter display to do this and that is sometimes not possible.</blockquote>