general problems of the 1999 Mercury Grand Marquis

Vehicle was parked. I went to turn my headlights on. No headlights, turn signals, dash lights, hazard flashers or dome light. The 2003-2005 models were recalled for this same thing with the lcm failing. Please look into this as this is a serious safety issue.

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.

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.

Problem: intermittent headlight failure while driving at night with 1999 (1998 year of manufacture) Mercury Grand Marquis. Lights go off for as long as 2-3 seconds and come back on again for a second or two, then go off again, then back on again, etc--and only occurs after the vehicle has been driven for 20-30 minutes. This happened once before, about two years ago, with this very same vehicle and I solved the problem by replacing the headlight switch on the dash. Apparently there is no headlight-related recall* for this particular Mercury and the cost to dig deeper into the cause of this problem by the Mercury dealership will be therefore at my expense. The cheapest repair cost scenario at the dealership is over $300. This problem should not have occurred under any circumstances in the first instance, not to mention now the second time. : nhtsc recall # 99v103 Mercury mystique (1998 year of manufacture).

After the consumer drove over a cattle guard the inertia switch activated causing the vehicle to come to a sudden stop. Nlm.