JosePacheco

While on the road,all of the sudden the instrument panel electric meters arrows went to a shutdown (voltimeter, temperature, RPM, oil pressure, etc) the power windows too. So, when I checked the voltage I got 18 Volts at the battery poles. I turned off the vehicle, and started it again, It worked properly for a few seconds, and went back to the same problem. After replacing the alternator, the battery charging warning light didn't turn off. And It has stayed that way since. How do I fix this condition? The unit is a SUV Expedition 1999

chipset

So how long is a piece of string ? Without more info and more testing on your part we are at a loss. What is the voltage on your new alt. at the battery ?

JosePacheco

The voltage in the new alt is 14 volt at motor idle speed

Bert

How about at the battery?

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Bert

JosePacheco

The battery is in good condition, and still charge, I make a charge test

JosePacheco

The battery have retained its charge overnight and the vehicle have started with no hassle. I have started the car in 12 hours intervals and it had no problems. I have checked the battery voltage while connected to the system and its avarage is 13.81 volts, but at no time the "The red battery signal on the panel" have turned off since the mechanical failure I spoke about earlier happened.

This are the things I have done to correct the problem:

1- Change the alternator (twice)

2- Checked if the battery is good (it is)

Someone knows what is going on?

Bert

Disconnect the 3 wire plug from the alternator, engine off key on. The light should go off. If it does, it's in the alternator. If it doesn't, there's a wiring problem in the light green/red wire.

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Bert