2003 Ford Expedition lighting system

2003 FORD EXPEDITION
150,000 MILES • 5.6L • V8 • 4WD • AUTOMATIC
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FPJS12345
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going down road at night I notice the lights seem to get a little brighter and then dimmer again,kind of a pulsation,noticed it to be not only in headlights,but even in dash and interior lights.dont know if its a short,the light switch or the multifunction switch.
Feb 1, 2015 at 12:33 PM
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FREEMBA
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First thing is to have the charging system checked. On many of these vehicles the lights will dim and brighten as the alternator goes bad. It is likely that your local auto parts store will check the charging system for you for free.
Let me know how it turns out.
Feb 1, 2015 at 1:09 PM