Mercury Grand Marquis owners have reported 1 problem related to turn signal flasher unit (under the exterior lighting category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Mercury Grand Marquis based on all problems reported for the Grand Marquis.
Turning signal started to flashing really fast, took vehicle to dealer and could not find cause. Engineer repaired lights. Consumer stated that seat belt warning light stopped working right after they fixed turn signal light.
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all problems of the 2001 Mercury Grand Marquis
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