Question about 1993 Lincoln Mark VIII
Not to be contrary, but if it doesn't charge on the car, it should not charge off the car-no difference. With it installed on the car, the large post on the back, with the engine running, should be tested with a meter-It should read about 14.3+ volts while idling, and whatever it reads at the alternator post should be very identical at the battery-if not, your problem is the harness going back to the battery, and you can do a quick fix by running a 2 gauge wire from the pos post on the alternator to the pos post of the battery, then your battery will charge IF the alternator puts out enough voltage AND it does not have a weak or burned out diode. Remember, your Mark is almost 19 years old now and it has almost 3 times the amount of wire in it as a normal car-very complicated and wire, over time, deteriorates and resistance icreases. I hava a 96 Mark VIII and I had a 93, so I am familar with them-your 93 has a 120 amp alternator which is marginal for any Mark, even new-I installed a nw 200 amp unit, and a 1000 cold cranking amp (32 degrees) battery-you HAVE to have a strong system with good connections throughout.
Posted on Apr 04, 2011
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Posted on Jan 02, 2017
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