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Do you own a DC volt meter and battery charger to do some tests for me?
Charge the battery for 6 hours or more on 6 amps or less. Now let it sit another 6 hours disconnected whats the voltage (DC)__________
Now immediatly hook up the battery cables, what is the voltage___________
Hook the battery up and turn the headlights on for 1 minute then back off for 1 minute whats the battery voltage_______
Now start the car and let it idle for one minute with nothing electrical running wahts the voltage at idle _________
While idleing turn on the headlights and wipers and rear window defrost and blower on high, whats the voltage____________
Copy and paste this in your response and fill it in.
charged battery 12.5 volts
connected battery 12.5 volts
lights on one minute, off one minute 12.4 volts
idle car one minute nothing on, 12.1 volts at idle
at idle turn on lights , wipers, rear defrost and blower on high, 11.4 volts
OK your battery is not charging at all. At idle it should be about 13 volts and with accessories on you should be around 14 volts.
This vehicle has a internal regualtor in the alternator so you dont have to look in to a computer concern here. You either have a fuse blown or wire issue or faulty alternator. There are a few tests to do here along with some explaining info from ford .Click here for this info and click here for the alternator test. Ford calls a alternator a generator so dont get worried when you see the word generator.