SOURCE: 2003 ford ranger battery light comes on
i think it is the alternator because the idiot light is connected to your regulator of your alternator. it is an indication that your alternator is not charging anymore.
tnx 4 using fixya,
drcool
SOURCE: 2003 ford explorer battery light on
Are you sure the alternator isnt "over" charging? if not, you may have a "loose" connection somewhere with the cables, or a malfunction in the dash cluster. Also, are you positive the battery is forsure good?
SOURCE: 2003 Ford Taurus, 90K, used car, engines shakes, ABS goes on
Are you getting any codes from the Check Engine Light? This sounds like it could have something to do with a sensor. Check your air filter and make sure it's clean. The tach on my 1999 doesn't really work, but it hasn't coincided with other driveability problems. The engine doesn't change in it's RPM's, the tachometer just stops working. Have your charging system checked. The shaking might be coming from bad fuel pump operation, clogged fuel filter, or dirty fuel injectors. Try putting an additive into your gastank to clean the injectors (a bottle of Seafoam is great for this). Try calling your local Autozone and see if they do free trouble code scanning. This might help lead you in a better direction.
SOURCE: 2003 Ford Focus battery light is on, but alternator appears good
Disconnect battery ground for 30 seconds & reconnect. Light should be out unless you have deeper diagnostic problem. Charging system good Battery good. This action should reset trouble light. Good luck!
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.
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