Question about 1992 Mercury Grand Marquis

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Headlights go from hi to low beam by themselves

If i turn my headlites on in the dark within 1 minute they start changing from hi beam to low beam at a rapid pace

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Hi, There is a short in the wiring to and from the switch. Check wiring.
Look in diagram on Manual. Could be also a bad ground. Good luck.

Posted on Oct 29, 2012


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Posted on Jan 02, 2017

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SOURCE: Headlights suddenly turn off

check your lo beam headlight relay sounds like its overheating

Posted on Aug 15, 2008

  • 467 Answers

SOURCE: 99 mercury couger-all headlights not working

check the fuses and relay that control the headlights

Posted on Jul 13, 2009

  • 7353 Answers

SOURCE: my headlights will not turn on

could be either headlight switch or hi-lo beam switch. ck all fuses first.

Posted on Oct 02, 2009

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