One problem related to hazard flashing warning light unit has been reported for the 1999 Mercury Grand Marquis. The most recently reported issues are listed below.
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.
| Headlights problems | |
| Exterior Lighting problems | |
| Headlight Switch problems | |
| Hazard Flashing Warning Light Unit problems | |
| Turn Signal problems | |
| Turn Signal Switch problems |