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International Automotive Technicians Network
Re: Why we do voltage drop checks
Posted to Technical Tips Forum on 1/7/2013

Had a Dodge van in here not long ago that was a no charging situation. Hooking up with a GMM from the positive terminal to B+ on the alternator showed 50 volts with the engine running. Wow, 50 volts. How is that possible? {;o)

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