Headlights will not work

2005 MERCURY MARQUIS
110,000 MILES
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ROGERMC68W
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Unless I pull back on the flash lever. checked fuses and replaced headlight switch. still nothing checked headlight fuse and replaced the headlight switch but still no headlights
Jan 14, 2012 at 9:00 PM
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JDL
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Maybe an issue with nultifunction switch/dimmer? In the diagram the gray wire is voltage for high and low beam, comes from the light module. Any applicable trouble codes?
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Jan 14, 2012 at 9:12 PM
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ROGERMC68W
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the parts store said there meter would not indicate unless a warning light was on
Jan 14, 2012 at 10:05 PM
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JDL
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Usually that isn't correct. If you have an inactive code, it would still be there, unless the code was manually erased or a certain number of drive cycles was completed. I'd have to double check that on your year--make and model.

I gave you a diagram.
Jan 14, 2012 at 10:10 PM
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MIKE H R
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Check headlight relay in the fuse panel under the hood. Your owners manual should tell you which one it is. When you pull back on the flasher it runs through a different relay. The headlight relay is a common item and most automotive stores have them
Jan 14, 2012 at 10:14 PM
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ROGERMC68W
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the owners manual doesn't show a headlight relay. looked it over pretty good but could not find it. sorry to be so much trouble but it has really got me flustered
Jan 14, 2012 at 10:39 PM
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MIKE H R
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No problem, I will check on it. There might be a diagram of the relays on the inside top of the fuse panel under the hood of the car on the drivers side
Jan 15, 2012 at 3:22 AM
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JDL
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I looked at a marquis GS w/drl, no relay that I can find.
Jan 15, 2012 at 4:16 PM
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