Question about 1992 Lincoln Town Car

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I have a 1992 town car. the battery light is on. i have replaced the alternator 3 times in one week. i also replaced the battery. i now have the strongest battery i could get from oreillys. the light is still on. they tested the alternator before i put it on the car and they said it was good. but when it was installed the tester read that it was only working at 30%. i even replaced the 3 prong wires that connect to the alternator. i am about to replace the ground wire cable from the battery to the car. idk what else to do. the alternator has a voltage regulator on it so i know it isnt that. NEED HELP ASAP

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Is the battery actually charging though?, you could be looking at a problem where the signal wire has a fault causing the light to come on the dash but the alternator is working fine? Check what voltage you are getting when running, should be about 14 volts. Also the will be a fairly heavy duty fuse somewhere on the circuit that could have blown if you have had a faulty alternator?. What do they mean it's working at 30%, if it's not charging at 14 volts at the battery then it's not working at all, if you have a dim battery light on the dash you need to be checking for a poor earth. Easy way to do this is a jump lead between negative terminal on battery and the body( extra earth) (apology if I am teaching my granny how to suck eggs)

Posted on Nov 28, 2014

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Since you've done all of the basics, I would lean more toward you might have an electrical short in the harness somewhere.

Posted on Nov 28, 2014

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