Where is the headlight sensor located on 2003 mercury grand marquis? on 2003 Mercury Grand Marquis

Sometimes they come on, other times no. Sometimes they just go out while driving.

by in Hoffman Estates, IL on March 12, 2013
1 answer 2 comments
ANSWER by on March 13, 2013
Try turning on the manual switch to see if that helps.
COMMENT by on May 18, 2013
sometimes yes and sometimes no
COMMENT by on May 18, 2013
Go out on dim/bright or either way? If either way i suspect headlight switch, if only one or the other i suspect dimmer switch.
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want to know if it is a sensor and where would it be located. also, an approximate cost of repair.