Question about Ford E-150

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Reset battery light

I just got a new battery in my 2003 Ford E150 but the battery light comes one if I use any electrical. Could it be the alternator?

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  • Ford Master
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Yes, it could be. A weak or old alternator may not be putting out enough current to satisfy the charging system. Try and have a parts store (autozone, or such) place a voltmeter on the battery with the engine running. If voltage reads less than 13.5 volts, it is probably the alternator.

Posted on Jul 25, 2013

Testimonial: "Thanks for the suggestion Monteham, very helpful. :) "

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  • Ford Master
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Sounds like it to me but i would test it first in case the warning light control is faulty ,start engine run at 1500 rpm then disconnect the neg lead and see if keeps running then if it runs turn on lights blower and so on if keeps running then alternator is ok

Posted on Jul 25, 2013

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Posted on Jan 02, 2017

csmock132
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SOURCE: Batter Light On, Ford Explorer

Does the alternator work? Does the light go out if you unplug the plug in on the alternator?

Posted on May 16, 2009

  • 534 Answers

SOURCE: I have a 2003 ford focus. Ford staes the

Check your battery ground connections. Make sure the vehicle chassis (and alternator) is properly grounded.
Check for any loose connections around the main high current 12V supply fuses.
Check the clicking in the steering column is not a loose supply wire arcing.

Posted on Jun 20, 2009

insanegtp
  • 112 Answers

SOURCE: 2002 Ford Excursion battery light come on intermittently

Remove power to all aftermarket components, if you know how to use a multi-meter connect to power source inside vehicle.. Drive normal, if voltage drops below 12v while driving, it is faulty alternator. If bat light comes on and voltage is above 12v the plug on the alternator might be correded and throwing faulty light, or bad ground in gauge cluster...

Posted on Jan 23, 2009

fordfixer
  • 58 Answers

SOURCE: Ford 2003 Expedition EB. Check Charging System

Its probably the alternator. It will need to be tested on the vehicle with the engine running and the light illuminated. Measure the battery voltage with the engine running. It should be at least 13.5 volts. If it is lower have the alternator tested at a shop with a charging system tester.

Posted on Feb 27, 2010

  • 474 Answers

SOURCE: battery light comes on while driving in my 2003

Check battery to motor and battery to body ground bolts for corossion, also check motor to body ground strap for corossion. Bad ground can cause all kinds of electrical gremlins

Posted on Sep 08, 2010

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