Question about 2001 Mercury Grand Marquis
This is a problem with your electrical sytem and your ecm brain computer. your computer is sending the wrong commands to your lighting accessories and overriding their switches. this happens in conjunction with the wiring harness that goes to your headlights. check the harness for any electrical shorts you may have ok?
Posted on Jul 26, 2009
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Posted on Jan 02, 2017
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