[Oldsguy]

Ground wire from the battery to the block. Positive wire from the battery to the alternator. Either one of those might be faulty. I don't know how the agency decided the alternator was bad but they might have mistakenly troubleshoot to the alternator instead of the real problem (that's called shotgunning). Anyway, take a closer inspection of those wires, if you find ANY green corrosion on either one or a bad crimp on the lug ends or a loose nut on the block, that might cause you trouble. Now if the car is REALLY eating alternators, I don't know he solution to that, maybe the crank pulley is misaligned with the alternator pulley and causing undue bearing wear on the alternator, just a guess.