headlights and dash lights pulsate

1997 CADILLAC ELDORADO
130,000 MILES
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JOHNS1955
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  • 2 POSTS
headlights pulsate when driving at night and dash lights pulsate during day time driving
Dec 14, 2011 at 9:04 PM
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FIXITMR
  • ✓ASE Certified Mechanic
  • 9,990 POSTS
  • ASE Certified Mechanic
how rapid is the pulsation? have you had alternator tested? have you checked voltage at battery while car is running to see if it has any fluctuations?
Dec 14, 2011 at 9:10 PM
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JOHNS1955
  • MEMBER
  • 2 POSTS
it goes from dim to normal about every second, alternator shows no problems or defects, have not checked voltage but battery is good.
Dec 14, 2011 at 9:22 PM
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FIXITMR
  • ✓ASE Certified Mechanic
  • 9,990 POSTS
  • ASE Certified Mechanic
does it do it with motor not running?
Dec 15, 2011 at 12:36 AM
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