Question about 2003 Ford Expedition
Battery light does not come off..after new battery n check alternor is good
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Posted on Jan 02, 2017
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
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
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
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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