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My 2002 F150 Supercrew headlights have begun to flicker at approximately 30-45 second intervals. I haven't noticed if any of the interior lights also flicker or if the volt meter changes when it occurs. The alternator appears to be charging since I checked it while running. Any advice?
The battery charge reads 14.5v when the engine is running so the alternator must be ok. I checked the volt guage when the lights flicker and did not notice ANY drop/change when the flicker occurs. Could it be the aftermarket fog lights or a ground strap problem? The fog lights have never caused a problem in the 5+ years they have been installed?
I believe that I may have solved my flicker issue. I was also having an issue with the ABS light occasionally coming on. I finally found that the right front ABS sensor was touching the exhaust manifold and melting/possibly shorting. I replaced it and my ABS problem disappeared. Now that I have driven it at night the flickering also seems to have cleared up.
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