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Mercury
Grand Marquis
Exterior Light
Brake Light
Not Working
I have no brake lights. Parking lights intermittent?
2004 MERCURY GRAND MARQUIS
85,000 MILES • 4.6L • AUTOMATIC
TRUCKWES
MEMBER
37 POSTS
I have no brake lights. Parking lights intermittent. i check all the fuses. Gear shrift struck in park.
Jun 21, 2026 at 6:15 AM
STRAILER
✓
Experienced Mechanic
55,540 POSTS
Yep, this happens when the lighting control module goes out, here is the location so you can swap it out. It is under the dash on the drivers side.
Image (Click to enlarge)
Jun 21, 2026 at 11:18 AM
TRUCKWES
MEMBER
37 POSTS
will LCM fix the stuck in park?
Jun 22, 2026 at 2:39 AM
STRAILER
✓
Experienced Mechanic
55,540 POSTS
Maybe, can I ask if you checked the system fuses? Please go over this guide to check the fuses.
https://www.2carpros.com/articles/how-to-check-a-car-fuse/
and this video may help as well:
https://www.youtube.com/watch?v=G-xNK79Wa-w
If the fuses are okay replace the LCM and then start a new question oft he stuck in park problem. Sorry, we only handle one problem per thread, please post your new question here, you must be logged in.
https://www.2carpros.com/questions/new
Jun 22, 2026 at 8:20 AM
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