Question about 1999 Ford Expedition
The most likely problem is your alternator, but you can check with a volt meter to ensure that is your problem. Start your truck (use a battery charger or jump to start it if you need to) and put your meter on the battery post's. If your reading 13volts or so your alternator is working and maintaing voltage, however if your reading starts dropping to 10 or less(may take a few moments to drop) then it's probably your alternator. You can also check your battery's voltage before starting your vechile, if the voltage increases after you start the vechile then it seem to be charging. Alternators can be repalced somewhat easily, it's only two bolts however you do have to remove the fan belt, and re-route after installing the new alternator. If you have some expirence working on cars you can do this yourself in your driveway.
Hope this helps
Posted on Jun 27, 2008
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Posted on Jan 02, 2017
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