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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / May 2006ford charging problem
have a 1995 mustang with a 3.8 engine. the battery light on the dash won't go off when the car is running. the car starts and runs fine, the voltage gauge when running is between the m and a in the word normal. the voltage at the battery with the car running is 14.4 volts. any ideas on what is causing this? the alternator has been checked and is charging fine. > have a 1995 mustang with a 3.8 engine. the battery light on the dash > won't go off when the car is running. the car starts and runs fine, the > voltage gauge when running is between the m and a in the word normal. > the voltage at the battery with the car running is 14.4 volts. any > ideas on what is causing this? the alternator has been checked and is > charging fine. The most likely cause would be a faulty voltage regulator on the alternator. The regulator can fail in such a manner that the charging system still works, but the internal circuit that controls the warning lamp is shorted. Either that, or the red with light green wire going from the indicator bulb to the voltage regulator is shorted to ground. Hint (unplug the small connector on the alternator and see if the light goes out). If it does then you need a new voltage regulator. A good electrical tech should be able to test the circuit for you. If you have a voltmeter (and look at it occasionally) you don't need an idiot light. Either remove the bulb or put some black take over it. > have a 1995 mustang with a 3.8 engine. the battery light on the dash > won't go off when the car is running. the car starts and runs fine, the > voltage gauge when running is between the m and a in the word normal. > the voltage at the battery with the car running is 14.4 volts. any > ideas on what is causing this? the alternator has been checked and is > charging fine.  SignatureMike Walsh West Palm Beach, Florida, U.S.A. probably a shot sensor. mho ve >save gas - by reducing your driving - 10%. > probably a shot sensor. > > mho > vƒe > > >save gas - by reducing your driving - 10%. Yeah, those Ford alternators are loaded with sensors. The Voltage does seem within the normal range. You need to get the wiring diagram to solve this mystery... www.telstar-electronics.com |
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