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Hello. My 1993 Mercury Grand Marquis died on the highway after the battery "alternator?" light coming on about 20 minutes prior. We replaced the alternator with a rebuilt and the light is STILL ON. Car starts with a boost, but dies shortly after. Took the rebuilt alternator out, went back to same mechanic and he rebuilt my original alternator and supposidly put on a new voltage regulator. Put it in car...LIGHT STILL ON. We are stumped. What could the problem be?

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A ford needs a fully charged battery to work the alternator. You may burn out the replacement alternator by hooking it up to a dead battery. Get the battery charged and have it load tested. You may have a bad battery and it should be checked. http://www.cardone.com/english/club/select/electrical/protech/tech_bulletins/PT37-0006.pdf

Posted on May 21, 2011

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