WHY DOES MY CARS HEADLIGHTS FLICKER WHEN GOING DOWN THE ROAD?

  • Tiny
  • azcatmeow
  • 2001 Chevrolet Tracker
  • 120 miles

"pulsate" would be a better term than flicker. Intermittent problem, have changed out the battery and the battery terminal ends; problem still persists. A short somewhere, i'm assuming, but how can I track this down? This has to be annoying as heck to oncoming drivers, as I can see the lights going from dim to bright ( not high beams) on the dash panel as well as the path in front of the car. It flickers at about the same rate as a heartbeat.

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Wednesday, October 3rd, 2012 AT 6:01 PM

2 Replies

  • Tiny
  • KHLow2008
  • Expert
  • 41,994 posts

It could be a bad ground circuit or a failing alternator that is causing it. Try cleaning and retightening all ground circuits in engine compartment.

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Wednesday, October 3rd, 2012 AT 6:07 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,994 posts

Check the ground circuit behind left side of dash as well and try swapping out the headlight relay to see if problem is resolved.

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Wednesday, October 3rd, 2012 AT 6:16 PM

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