Headlights dim

Asked by Kayla Apr 20, 2019 at 10:28 AM about the 2007 Hyundai Santa Fe 2.7L GLS FWD

Question type: Maintenance & Repair

Around 1000 rpm, my headlights (most noticeable)
dash lights and interior lights dim. Always when
braking or decelerating. And only for maybe a
second or two but it gets very dim. Sometimes the
radio pops out for a split second as well but goes
back to normal. I just had a new alternator put in
and have driven on it quite a bit to try to get it
“broken in” per say. But nothing has worked. The
tests on the old alternator came back bad so that’s
why I got a new one. This still happens on the
replacement. I’m not super knowledgeable on cars
but would love to know what’s going on. Thanks!

1 Answer

327,345

Check the output voltage of the alternator. The battery may be weak so have it tested.

Your Answer:

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