Question about 1999 Ford F250 Regular Cab

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Battery light stays on even though alternator and battery is good.

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Check the drive belt and checkout everything to see if there is anything is on and if everthing checkout ok test the starter too.

Posted on Apr 13, 2009


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Posted on Jan 02, 2017

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SOURCE: alternator light on

The alternator is not producing any power . If it were the engine would run without the battery. Check the wiring on the alternator. It must ave an exciter wire to make it work.

Posted on Oct 07, 2008

  • 56 Answers

SOURCE: security light stays on.

Your security system has locked itself. You will have to go to the dealer and have them reset the computer.

Posted on Aug 09, 2008

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SOURCE: Battery light still on after changing alternator and battery.

i have a 2003 chevy silverado the riverse has not worked for 10.000 miles any sugesstionswhat this might be and or how much.

Posted on Jul 15, 2009

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SOURCE: my battery light won't go off

well; on your car, the alternator has an internal regulator. have you checked any wires or harnesses that ran off the battery? And see if you may have a cut place on your cables, or if one has come loose from the ground.

Posted on Sep 07, 2009

  • 1168 Answers

SOURCE: My lights are staying on even when they have been

99% sure the issue is your daytime running light module. They were a real problem on those model years.

Posted on Oct 28, 2009

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Your alternator is putting out good voltage, so internal voltage regulator is working, but what's happening the Diode is what going bad, the alternator put's out ac voltage, and the Diode turn it to dc voltage, could mess up your battery and elec. system, the Diode are like a one way valve, have it checked with a alternator, battery, starter tester, most auto parts will do this for free, if Diode's are bad it will show up in there tester.

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turn on your car. remove the ground battery terminal and if the car turns off, then theres a problem with the alternator(even though it's new) or the alternator wiring. if it stays on, then the alternator is working. test your battery at the auto parts store to make sure it's good. Now, if the battery is good, then theres a short in the system. See this video on youtube to help you find a short in the system.(

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It could be the alternator not charging properly. Even though you're not having trouble starting the car, the alternator could be putting out just enough to handle charging the battery. But eventually it will go out. The battery light can mean either the battery is not charging correct from the alternator, or it's time to test the battery, which I think is good from your entry.

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Battery light still on after changing alternator and battery.

Did you check the fuses? Are your cables to the battery corroded? Is your ground wire connection clean . Did you get a cheap-*** alternator? Did they check it where you bought it? You may have to have it checked at a napa or other store. Sometimes "reconditioned" means "repainted"
Hey, I've been there. If its a discount store alternator get another place to check it. May save you some grief.

Jul 08, 2009 | 1999 GMC Sonoma

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Battery light stays on

dear friend-it sounds to me that your vehicle is only running on battery power.i believe you alternator is not charging as it charges threw the light when it is of,have the alternator tested

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The battery(voltage)light stays on even though the battery stays at afull charge

This is, on most occasions, an indication that your alternator may be malfunctioning.

I would recommend taking out the alternator and having it tested. Most Advanced Auto Parts and Pep-Boys do this service for free.

Jun 04, 2009 | 1985 Chevrolet Cavalier

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