So far what I've learned in electrical is that most of what we'll be dealing with is HRVDs. The first thing we're supposed to do is connect our negative lead to the battery post itself. Then we go to the load and start from there. If it's on the power side we'll see a HRVD before the load. If it's on the negative side we'll see voltage after the load that doesn't look like zero. If we have an "open" then there's no current flowing. If we have a short then we'll be looking at best case scenario a blown fuse and worst case is burnt wires. Also the main idea Jeff pounded into my head is "No current flow, No voltage drop".
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