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I have a 94 mx6. The crankshaft pully, alternator belt, and something else broke all at the same time. After thinking the something else was the alternator because it was only charging at 12 volts I put a brand new one on. That fixed it for about two weeks before it broke again, both of the alternators test good at advance. I've went through all my grounds and everything else seems to check out but no charge(limited). My dad thinks it's the voltage regulator. Please help me.
 

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If you have a 2.5 liter, then the voltage regulator is built into the alternator. If the alternator tests ok, then I don't see how it is the voltage regulator. Do you have tight belts? Is the belt tensioner still good? Are you running a high powered stereo amp?
 

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Replace the main heavy power wire that runs from the alt to the battery. This time, bypass the fuse box for less resistance.

Also replace the signal and power wires. They get brittle and corrode inside, making for bad charge levels.

This may solve your issues.

PS - Have you checked/tested your battery? Is it not killing your alt's?
 
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