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I posted this under general discussion and got no reply.
This is on my 98 Taurus.
When driving at night the head lights will dim, then go back to normal. This happens every once in a while. Is this the alternator going bad? Bad battery?
or what?
I would check the battery first (easiest), then the alternator (some places will check the alternator for free--but you gotta remove it from the vehicle). I can't for the life of me remember which one it was for me when it happened on my crown vic
Do you have a high powered stereo system? If you do, it could be that your bass is hitting, and drawing a lot of current and dimming the headlights. How old is the battery?
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