Headlights just started to go out then come back on, parking lights not affected. Where should I start to track this problem down?
I would make sure the headlight harnesses are plugged in tightly. If they are, then there is probably a short somewhere between the headlights and the battery and you will have to trace the circuit until you find the short.
thanks Jonathan, just got back to this site as you can see I posted the same Q again.
change the switch in the dash
I just had that problem and replaced the light control module which solved the problem. Mine is a 2004 model also. Question for you: When you open the driver's door to get in, do you have a chime going off? After replacing the light module, Mine chimes when I open the driver's door even though no key is in the ignition. Open any other door and it doesn't chime. VisualTracker
What was the cost of the LCM and labor charges? Have you had the problem since? Thanks, ron
Cost was $500, most of which was a new LCM. No problem since. I searched online and found a refurbished module much cheaper (Appr $200), but with no lights, chose to have a new/readily available module installed.
The rebuilt ones work fine.
Looking for a Used Grand Marquis in your area?
CarGurus has 1,690 nationwide Grand Marquis listings starting at $1,500.
Search Mercury Grand Marquis Questions
Mercury Grand Marquis Experts