Mechanics

BATTERY LIGHT COME ON AND THEN GOES OFF

2005 Mercury Marquis • V8 2WD Automatic • 114,000 miles

I own a 2005 Mercury Grand Marqui GS I replaced the battery and alternator 10 months ago and now the battery indicator light on the dash lights every morning, and stays on till you run the vicheicle several miles then turns off, I had the battery and the alternator checked, they said they were working properly.
The car is equipped with the automatic headlight system, that when you pull the door handle when it is dark out the headlights come on. If this light keeps coming on is there going to be more problems, or just a pain. Thanks
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Wastemhall
July 20, 2011.




Suspect faulty diode in ALT will not show up on Auto Parts house test needs to be checked with a scope

Docfixit
Jul 20, 2011.


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