Question about 2003 Ford Expedition

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Check Charging System/told not the alternator

I have a 2003 Ford Expedition...the battery light comes on and it says to check charging system. My gauge went all the way to L for my battery charge so I went and purchased a new battery because when they hooked it up to the machine it was only charged at 72%. It ran with no problem for 1 week. The auto zone guy even checked the alternator and he said it was nothing wrong. Then it started doing the same thing this past weekend. Took it back to auto zone and was told it was the alternator. Was on my way to my personal mechanic and the battery light went off, the check charging notification went off and the battery showed fully charged. My mechanic still put it on the machine but i was told since it showed no notification it showed nothing wrong. Last night I was headed to my moms and the gauge started going towards the L (low charge) again. I made it to my moms and turned my truck off, tried to start it again and it just clicked. Sat with my mom for 10min waiting on my fiance and when i went back out to try and start it, it started right back up and full charge. It cant be the alternator because it keeps starting back up with no need for a boost. Could it be the belt or is it something deeper...HELP!!!

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  • Ford Master
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Check your battery connections - where the cables connect to the battery posts AND where the cables connect to the starter/main power feed and where the ground cable connects to the engine and/or frame. A poor or corroded connection can cause intermittent problems and poor charging performance.

Posted on Mar 03, 2017

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Posted on Jan 02, 2017

fordfixer
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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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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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The battery light is telling you that you are running off the battery,and you have a problem with your charging system. An easy way to check your alternator is to get a volt meter, and measure the voltage of your fully charged battery. with your expedition not running, it should read about 12.6 volts. When you start your expedition, it should read approx 14 volts if your alternator is working properly.
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