Question about 2005 Harley Davidson FLHRS - FLHRSI Road King Custom

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Battery fuse blows when i hook up new battery

My battery fuse blows when I hook up new battery

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With battery disconnected, take a meter reading [resistance / ohms] across the battery leads. It sounds like you have close to a short circuit in your primary charging/supply circuit. 0.6 ohm will take out a 20 amp fuse. Ohms law I = V/R. Quite a few other factors to take into account but you'll have to find what's causing the low resistance.

Posted on Dec 01, 2013

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By any chance are you installing the battery in reverse? This will blow the fuse at best case or cook all the electrics at worst. Check polarity of battery and make sure negative goes to ground. Check battery to make sure it has not been reversed charged, in other words positive terminal is nevative and the negative is positive. I have seen this.

Posted on Jun 29, 2014

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