Common questions

How long does it take a alternator to charge a dead battery?

How long does it take a alternator to charge a dead battery?

Basically, at idle you can probably get 80 amps out of your alternator. You can charge a flat battery to 80 percent full in about 2 hours, so long as you alternator can manage produce around 14 volts at the battery terminals this whole time.

What to do if your Ford F-150 alternator is not charging?

Ford Dealer gave up after 3 weeks… had to pay $200 for them to find nothing…and had me take truck back.; 17 people found this helpful. Check voltage drop on red cable from battery to alternator and also do an alternator ripple test.

Where is the battery terminal fuse on a Ford F-150?

Found the big black battery terminal fuse box on passenger side of engine compartment. Inside the cover were two large fuses and under those was a smaller fuse inside a clip cover. The smaller fuse is a standard 10 amp auto fuse. It was blown by the alternater. Replaced the fuse and the problem was solved.

Can a bad car battery cause an alternator to not charge?

In theory a car can run only with the alternator charge, but this can cause heavy voltage spikes and other strange symptoms so this means that a bad car battery can cause an alternator to not charge also. Cars are increasingly coming with modern electronics.

What kind of battery does a Ford F250 use?

92 ford f250 custom 351w new alt new battery new terminals truck runs but dies when the battery dies. Any ideas? 7 people found this helpful. I just got done working on a 99 F150 same issue replaced Alt. and battery, no charge.

Why is my Ford F-150 not charging the battery?

The car is shutting off because it had ben running off the battery until there is not enough juice left in the battery. So ya, gonna have to check the wire that runs to the battery from the alternator & the small wire that plugs into the alternator.

Is the alternator on my Ford F-150 working?

Any update? 2003 F150 New Battery, Alternator good.. NO battery light on dash. Truck will run fine until battery drains…. multiple shops including Ford Dealer. Ford Dealer gave up after 3 weeks… had to pay $200 for them to find nothing…and had me take truck back.; 17 people found this helpful.

Found the big black battery terminal fuse box on passenger side of engine compartment. Inside the cover were two large fuses and under those was a smaller fuse inside a clip cover. The smaller fuse is a standard 10 amp auto fuse. It was blown by the alternater. Replaced the fuse and the problem was solved.

Why is the battery light still on after a new alternator?

So, now truck has new alternator and battery BUT battery light is still staying on. I had them check both and they said, new battery and alt showing good. I know all of the connections are tight and I checked the fuses inside the truck and all are good.

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Ruth Doyle