Question about 2003 Ford Expedition

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Wheres mega fuse on 03' ford expedition

Battery light does not come off..after new battery n check alternor is good

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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chuck943
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SOURCE: ford expedition yr'00 headlight not working checked fuses..

The low beam headlamps have a seperate fuse for each lamp in the central or underdash fuse panel.
The right headlamp is fuse fuse 26 (10amp) and the left is fuse 28 (10 amp). These fuse are hot only when headlamps are on so you need to test them with a test light with headlamps on. If they do not have power to them then concern is either headlamp switch or daytime running lamp relay if your vehicle is equipped with this feature, or a bad multifunction switch.
Power leaves the headlamp switch on the RD/YE wire and goes to multifunction switch. It leaves multifunction switch on the other RD/YE wire The wire will then go thru either a connector c2003 located behind the passenger side air bag behind the dash or to the DRL relay if your vehicle has this feature and leaves there on RD/BK wire to the headlights .

Posted on Feb 24, 2009

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michigan man
  • 3533 Answers

SOURCE: fuse box diagram

www.edmonds.com for owner manuals online I also have a 2000 expedition and it is normally one of the coil packs is out if you have an autozone near you they will put it on the tester for free and that way you will know what is wrong and if it is the coil pack if you are standing in front of the truck looking at the engine this is how the cylinder location is on the passanger side back to the back of the engine is one thru four and on driverside is five thru eight so when they tell you which coil pack is bad you will know which one to replace and you can get just the boot and a new spring and replace that for around $6 to $8 then replacing the whole thing for around $65. try www.autozone.com to see if they have your car listed for diagrams pictures and step by step instructions if your car is not listed then try your local library they have all the car manuals and even copy them for you

Posted on Mar 21, 2009

  • 1 Answer

SOURCE: 2000 Ford Expedition, power windows and dome lights won't come on

2000 ford expedition passanger power window wouldn't work

Posted on Oct 15, 2009

  • 246 Answers

SOURCE: reset ems (check engine light) on ford expedition

Try to remove positive baterry terminal for 20 minutes and install it nack. That will reset your ECU and it will run little rought tilll learn new change in 02 sensor.

Posted on Feb 20, 2010

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

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I have a 99 ford expedition eb ive had the battery n alternator tested both reading at the right volts but the battery keeps dying.... ive made sure every thing was tight n where they should be n...


If the alternator is charging the battery, and it goes dead overnight, you have a short to ground in the wiring that is draining the battery.
You can try disconnecting the negative battery cable and see if the battery stays charged when the engine is off.
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1997 Ford truck new battery and alternator still not charging what do I check next


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Changed alternator,battery and still won't keep battery charged


CHECK ALTERNATOR 175 AMP MEGA FUSE. AND CHECK ALTERNATOR 20 AMP INLINE FUSE.IF FUSES OKAY.REPLACE BATTERY CABLES AND CHECK ALTERNATOR BATTERY FEED WIRE AND VOLTAGE REGULATOR WIRES FOR DAMAGE.AND CHECK DRIVE TENSION.MAKE SURE DRIVE BELT NOT DAMAGE OR SLIPPING.

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I got a alternor for a 1989 chevy the two wire on it says 1 & 2what is post one and post two and where do they go? I'm taking off an genter on a 8n ford tractor and putting this alternor on the...


  • Wire the "#1" terminal to the ignition wire from the key switch. This connection is responsible for making sure the alternator only engages when the car is powered on.
  • Wire the "#2" terminal to the positive battery line. This connection will insure the alternator only engages when the proper battery voltage is reached.
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    Have checked battery and alternator, both good. Have continuity through heavy wire and the two other wires that come to battery but alternator will not charge battery. The instrument panel RPM and light...


    If you look where the heavy wire from the alternator goes into the end of the fuse box near the battery there is a mega fuse there. I would check that and the nuts that hold that fuse in, they might be loose causing a poor connection.

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    i had a similar problem with my 2000 ford expedition. After 3 new alternators and a new battery i figured out it was a 20 amp alternator field fuse blown located in the under the hood fuse box. Good Luck!

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    1998 Ford Contour Light on and mega-fuse


    well if the ohm's are showing OK, then you may actually have a more serious problem, it is never good that the voltage light is on or stays on.

    my suggestion is to take it up to autozone and tell them you want a trouble code done.

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