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Battery not charging issue.


Madazbpt

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I have a g3 link installed into a mazda familia GTR, and I'm having issues with the alternator not charging the battery. Two different brand new alternators installed and still same issue. It seems to charge again when going over bump. The shop seems to think the ECU is at fault, what would it be and can the ECU be fixed? Or will I have to replace it?

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Im 99.9% sure these are a common "3 wire" internally regulated alternators, about as simple as alternators get.  There is no connection to the ecu, the only thing it needs is a charge lamp of adequate wattage connected to the L terminal and the "S" sense wire connected to the battery.  

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