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An ohm meter on continunity setting will read through any connected load on that wire to ground. Make sure the wire you are testing has no other interconnections before it reaches the switch, including at the fuse block. On my car some of the fuses"hot" side are interconnected on the back of the block. I would remove the fuses just to make sure. If you have the circuit truly isolated and the test to ground gives you a "beep" then you most likely have a short. HTH Jim
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