SOURCE: no brake lights
Sounds like it has a bad brake lamp switch. It's possible that if you have a third brake lamp and that works, but the others don't, it is a bad multifunction switch. The brake switch is located on the brake pedal. The multifunction switch incorporates your turn signal/ hazard/ high beam lever mounted on the steering column. As confusing as this sounds, I hope this helps.
SOURCE: turn signals dont work brake lights dont work
You didn't mention your rear brake lights. If they don't work either then you probably have a bad light control module (LCM). This is a common problem with big Fords. You can buy a replacement part ($250) or have yours rebuilt (www.autoecu.com). The module is located under the dash to the right of the steering column and is fairly easy to replace.
Do the turn signals work? If not it may be the turn signal switch. The aftermarket parts are cheaper than a Ford factory part; check the guarantee before deciding.
Worse case scenario? You need both parts.
SOURCE: 1998 Mystique brake lights don't work while the window brake light does work.
Try a continuity test, not sure where to find the electrical scheme but if you obtain it, use a tester or borrow one to test the continuity of the wires of both taillights, could be simple as a cut wire.
SOURCE: The brake light comes on, on the dash. Brakes work
Make sure your emergency brake pedal is all the way up, because sometimes if it goes down one notch, that can trigger that light to come on..It wont be enough to drag or slow the sar down, but it will be enough to turn that light on...Also even though your brakes are good..double check your break fluid level...
SOURCE: how to replace starter +1993 Mercury Grand Marquis
disconnect battery,,jack car up,,put jack stand on frame,,take starter bolts out,(may not be easy),,take wires off starter,,hoped it helped,,
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