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Ron, ASE Certified Technician
Category: Mercury
Satisfied Customers: 35523
Experience:  ASE Certs and Ford Certs
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2003 mercury grand marquis, headlights went out without

Customer Question

2003 mercury grand marquis, headlights went out without warning.Has this been a problem that has been reported?
Submitted: 1 year ago.
Category: Mercury
Expert:  Ron replied 1 year ago.

Hello and thank you for your question,

The problem you are describing is a common one and in most cases its caused by a failing LCM (lighting control module) located under the dash just above the gas pedal. In most cases the fix is to replace it but to be sure you should do the test steps to be sure. I have enclosed them in the link below. Copy and paste the link to your browser to open and view the steps.

See this link below for the location and removal steps as well.