Table 1 shows ten common electrical system related problems of the 1998 Mercury Grand Marquis. The number one most common problem is related to the wiring (three problems). The second most common problem is related to the underhood wiring (three problems).
Low/high beam lights inoperative in park or drive, bulbs & wiring checks good, 25 amp fuse was blown, but replaced fuse caused no change. Read details...
After replacing several components of the electrical system including pcm, two power packs and a wire harness installed and the vehicle still does not start. Read details...
While driving on the highway at 65 mph, black toxic smoke suddenly started bellowing out from around the radio area in the center dashboard. A loud rapid clicking sound was also heard. Upon realizing what was going on, I steered the car safely off the highway ramp and shut the vehicle off. Read details...