At 10:47 PM 3/15/2011, Robert Stevens wrote: >Makes me wonder that if you were to run a test wire with a fuse in >its line, bypassing the fuse panel, to the wires going into the back >of the fuse panel at #8, .... if you'd then find out >that something has "melted" in the panel that is creating the resistance? Bob, when you're tracing a short circuit controlled by a single fuse and without easy means to disconnect parts of it there are three basic ways to go about it. First is visual inspection, oops I mean looking at it. Second is measuring resistance; but that requires a much more sensitive ohmmeter than most of us have access to. The third (which I described in my previous post) is essentially to fake a very sensitive ohmmeter by passing a large but controlled current through the circuit and measuring the voltage drops. The branches with no current flowing will show a constant low voltage, but the branch with the short will show a voltage that decreases as you get nearer and nearer to the short. Ah - with the new clamp-on DC ammeters there's a fourth method as well. Then there are all the ways involving unhooking stuff, of course. Yours, David |
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