1999 MERCURY GRAND MARQUIS Complaints

PLASTIC INTAKE MANIFOLD FAILED, ANTIFREEZE LEAKING FROM AROUND THERMOSTAT DUE TO THIS FAILURE AND LEAKING INTO COIL PACKS AND CAUSING MAJOR MISFIRE IN MOTOR. HAPPENED SUDDENLY, NO INDICATION OF LEAK PRIOR TO THIS FAILURE. WAS DRIVING WHEN THIS HAPPENED AND HAD TO CALL FOR HELP TO GET VEHICLE BACK HOME, AND NOW CAN'T DRIVE IT . COST TO FIX IS EXPENSIVE, AND THE CAR RAN GREAT UNTIL THIS HAPPENED. SOUNDED LIKE I HAS THROWN A ROD, POPPING LOUDER ON EXCELERATION, SO I IMMEDIATELY PARKED IT AND TURNED OFF THE MOTOR.

INTAKE MANIFOLD FAILED (BURNED AND DISINTEGRATED IN THE AREA OF THE THERMOSTAT ) AND HAD TO BE REPLACED AT CONSIDERABLE EXPENSE . PRESENTLY THE SPEEDOMETER FAILS INTERMITTENTLY DROPPING TO ZERO AT RANDOM MOMENTS. MOST IMPORTANTLY THE LIGHTS CUT OUT INTERMITTENTLY USUALLY WHEN THE HEAT IS ON AND ON LONGER TRIPS. ALSO, MOST TIMES IT HAS HAPPENED WHEN IT HAS BEEN RAINING AND COLDER. DROVE UPWARDS OF 40 MILES WITH THE HEADLIGHTS CUTTING OUT INTERMITTENTLY IN THE RAIN AND COLD, PROBLEM HAS CONTINUED TO RECUR BUT SEEMS TO BE RELATED POSSIBLY TO HAVING THE HEAT ON. I BELIEVE THE LIGHTING CONTROL MODULE IS LOCATED NEAR A HEATING OUTLET AND MAY BE SUFFERING A FAILURE AS A RESULT BUT THIS IS JUST SPECULATION. ALSO, PREVIOUSLY WHEN I HAD PULLED INTO A REST AREA FOR AWHILE, AFTER COOLING DOWN, THE PROBLEM WENT AWAY FOR A LITTLE WHILE THEN RESUMED AFTER ABOUT TEN MILES WITH THE HEAT ON. I BELIEVE IT IS BEING CAUSED BY THE EXCESSIVE HEAT THE LCM IS SUBJECTED TO BY VIRTUE OF THE AREA IN WHICH IT IS INSTALLED. THE LIGHTING CONTROL MODULE IS OF MOTOROLA MANUFACTURE WITH SIEMANS RELAYS INSIDE. THE PART HAS NUMEROUS NUMBERS ON IT , MOST PROMINENTLY: XW7T-13C788-AA , 6MX2794A01, 990429A, AND LIGHTING CONTROL 95M .OTHERS ONLINE WITH SIMILAR VEHICLES (CROWN VICTORIAS) AND OF OTHER MODEL YEARS MANUFACTURED BY FORD HAVE REPORTED SIMILAR PROBLEMS AND THAT REPLACING THE RELAYS HAS RESOLVED THE ISSUE. I DO NOT KNOW THAT THIS PART IS THE SOURCE OF THE PROBLEM BUT SUSPECT IT AS MANY OTHERS ONLINE HAVE REPORTED THAT THIS PART WAS THE SOURCE OF THEIR PROBLEMS.

TL* THE CONTACT OWNS A 1999 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT THE BALL JOINTS WERE REPLACED BUT THE BOLT THAT HELD IT IN PLACE WAS LOOSE AND CAUSED THE CARTER KEY TO FAIL TO HOLD THE BOLT IN PLACE. AS A RESULT, THE BOLT NECK DETACHED WHILE THE CONTACT WAS DRIVING APPROXIMATELY 20 MPH AND CAUSED THE VEHICLE TO STOP ABRUPTLY. AS A RESULT, THE CONTACT'S HEAD HIT THE STEERING WHEEL. THE CONTACT SUFFERED A WHIP LASH THAT REQUIRED A MEDICAL ATTENTION. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS REPAIRED BY THE CONTACT WHO WAS AN INDEPENDENT MECHANIC. THE FAILURE MILEAGE WAS APPROXIMATELY 200,000.

AT NIGHT WHILE DRIVING HEADLIGHTS AND DASHBOARD LIGHTS WENT OUT ON FREEWAY AND COULD NOT BE TURNED ON AGAIN. HAS HAPPENED ON TWO OCCASIONS AND VEHICLE CANNOT BE DRIVEN AND UNSAFE. *TR

SEAT BELTS FRONT BOTH SIDES,NOTHING BUT THE RETRACTER STICKS,SLOW MOVING LAP&SHOLD. STEERING SHAFT SEPARATES,RATTLES WHEN HITTING BUMPS HARD.

THE PASSENGERS SIDE SEAT BEAT COMES UNDONE AT TIMES AND THE SPEED SENSOR WORKS INTERMITTENTLY AND IT LEAKS GAS FROM AROUND THE FUEL PUMP

TL* THE CONTACT OWNS A 1999 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT WHILE DRIVING AT APPROXIMATELY 35 MPH, THE LOW BEAM HEADLIGHTS FAILED INTERMITTENTLY. THE CONTACT MENTIONED THAT THE HEADLIGHTS WOULD ACTIVATE AND DEACTIVATE INDEPENDENTLY. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE CONTROL MODULE WAS DAMAGED AND NEEDED REPLACEMENT. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE MILEAGE WAS 133,596.

WHILE DRIVING ON THE EXPRESSWAY, THE VEHICLE SUDDENLY CHANGED LANES AND THE STEERING BECAME ERRATIC. UPON EXAMINATION, THE IDLER ARM HAD SEPARATED FROM THE STEERING LINK ARM. THERE WAS NO WARNING AND THE VEHICLE HAD RECENTLY PASSED A SAFETY INSPECTION.

TL* THE CONTACT OWNS A 1999 MERCURY GRAND MARQUIS. WHILE DRIVING APPROXIMATELY 40-45 MPH, THE HEADLIGHTS STOPPED FUNCTIONING INDEPENDENTLY. THE FAILURE HAPPENED WITHOUT WARNING. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO DIAGNOSED THAT THE CONTROL MODULE BEHIND THE DASHBOARD MALFUNCTIONED AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED DUE TO PARTS NO LONGER BEING MANUFACTURED. THE MANUFACTURER WAS NOT MADE AWARE OF THE ISSUE. THE APPROXIMATE FAILURE MILEAGE WAS 140,000.

THE 3/4 KEY ON THE DRIVER SIDE DOOR RANDOMLY QUIT WORKING. EVERY OTHER BUTTON STILL WORKS, AND WHEN ANY BUTTON OTHER THAN THE 3/4 KEY IS PRESSED, THE KEYPAD LIGHTS UP. MY KEY CODE INCLUDES THE 3/4 KEY THOUGH, SO I CANNOT USE THIS KEYPAD TO UNLOCK MY VEHICLE OR TRUNK. HOWEVER THE KEYPAD LIGHTS UP ON ITS OWN, WHICH CAUSES MY EXTERIOR AND INTERIOR LIGHTS TO ILLUMINATE. THESE LIGHTS CYCLE ON FOR ABOUT 15 SECONDS AND TURN OFF FOR ABOUT 30 SECONDS. I HAD TO REMOVE MY INTERIOR DOME LIGHTS BECAUSE THEY WOULD DRAIN THE BATTERY. IF I AM PARKING FOR AN EXTENDED PERIOD OF TIME, I HAVE TO DISCONNECT MY BATTERY SO THE LIGHTS WILL NOT DRAIN IT. THE FORD DEALER CHECKED FOR A RECALL ON THE LCM, BUT THE RECALL DOES NOT AFFECT THE 1999 MODEL. *TR