Question about 1998 Ford Expedition

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Battery light stays on - not charging. battery & alternator good.

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  • 158 Answers

Latifrashed, Look for an inline fuse coming off the alternator wires. Ford sometimes uses a 20 amp fuse located under a cover on the firewall marked engine main fuse. Check the fuse and if blown then this should solve your problem. If there are fusible links involved then these will have to be checked as well. Good luck with this.

Posted on Apr 11, 2011

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6ya6ya
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Posted on Jan 02, 2017

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Benimur
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SOURCE: 2002 kia sedona van

Hi,

There has been known issues with the alternator on several year/versions of this car. If memory serves me right, there was a TSB for the alternator either over or undercharging.The TSB (Technical Service Bulletin) specifies replacing the alternator and re-flashing the PCM.(Powertrain Control Mudule).

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Jul 19, 2008

freetek
  • 5568 Answers

SOURCE: 2002 sonata 2.4l battery dash light on. replaced alternator. Still not charging

I don't know if your car has an integrated regulator or not; some house the regulator in a section of the alternator case, others mount it remote from it. The regulator monitors the load and battery voltag,e primitively but effectively, and controls the current flowing through the field winding of the alternator to ground, changing the magnetic field intensity and consequently the voltage output of the alternator. The 'hot' end of the field is internally connected to the + output, the 'cold' end is controlled by a transistor inside the regulator which, in turn, is controlled by circuitry monitoring the system voltage.     Some alternators can be tested by sticking a wire through a specified opening, actually shorting the controlled end of the field to ground briefly, while monitoring the voltage across the battery, doing this though for seconds only. This essentially bypasses a suspected defective regulator; this causes the output voltage to rise instantly to its maximum of ~17 volts if the alternator is OK.
I don't recommend poking a wire at random into an available opening so having a service manual (Haynes-Chilton) would be nearly mandatory.

Posted on Oct 03, 2008

  • 22 Answers

SOURCE: support for the charging system

Check with dealer there are recalls on the 2000.

Posted on Nov 23, 2008

  • 1 Answer

SOURCE: possible bad alternator?

I went through three alternators before we found a good one for our saturn sl2. Now she has been good for two years. All I did was go back to where we bought it from, they hooked up the alternator to a machine and gave us a new one when it read that it was faulty.

Posted on Apr 13, 2009

  • 163 Answers

SOURCE: 2002 Honda CR-V Battery Light needs to be reset

Get a code tool from the parts store. You can reset system with that.

Posted on May 10, 2009

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check the 175 amp mega fuse in the engine compartment.

cehck this ground for a good connection - G104
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If your "battery" light on the dash is going on and staying on the alternator is definitely faulty, either the diodes or the wiring. However, if the light doesn't come on when you turn the ignition key to "IG" position - befort it starts - check that the bulb is ok. The alternator won't work if the bulb is dead.

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