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Brian, Ford Shop Foreman
Category: Ford
Satisfied Customers: 1360
Experience:  Ford Senior Master certified Tech, 36 years Ford technician.
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check charging system warning light in 2005 Ford Explorer XLS

Customer Question

check charging system warning light in 2005 Ford Explorer XLS has begun flashing and beeping. Trying to determine cause.
Submitted: 6 years ago.
Category: Ford
Expert:  Brian replied 6 years ago.
This may be caused by the alternator not outputting enough voltage, if you have access to a voltmeter you can test to see if the alternator is charging. First, check the battery voltage with the voltmeter, with the engine off, key off. You should read around 12 volts, give or take a volt. Then, start the engine with the voltmeter still attached to the battery terminals, the voltage should increase to about 14.2 volts or so, if the voltage doesn't increase, the alternator is not putting out. If it increases, try turning on headlights, rear defrost, blower motor, radio and see if the alternator can maintain the voltage, it may be failing under a load.
Customer: replied 6 years ago.
So it could it b the battery itself?
Expert:  Brian replied 6 years ago.
It may be, but if the alternator is bad, the battery voltage may be low due to the low output of the alternator.
Customer: replied 6 years ago.
Is it is change for the novice do it yourselfer...
Expert:  Brian replied 6 years ago.
Yes, pretty straight forward, these are mounted at the top of the engine, you need to relieve the belt tension, remove the three bolts and the electrical connections.