i have replaced the alt. and bat. on my 1999 ford taurus.wheni hook the wiring up to the new alt. the housing on the alt. and the pos.cable on bat. are getting hot to touch.when i shut the motor off and leave it over nite the bat.goes dead.why

Asked by Jun 09, 2015 at 01:06 PM about the 1999 Ford Taurus SE

Question type: Maintenance & Repair

1 Answer

105,265

Sounds like a bad diode in the alternator. Try this: get a test light and unhook a battery cable, put the test in- between the cable end and battery post, if the light turns on then you have a draw large enough to kill an battery overnight, next electrically disconnect the alternator, if the light goes out then there is your problem. If the light does not go out then you will have to start pulling the fuses one at a time noting the location until the light goes out, when it does find out what components are on that circuit and repair or replace as needed, then start putting the fuses back in and reconnect the alternator.

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