Brake lights I have a 1991 Mercury Grand Marquis with no brake lights. Have checked fuses, used test lights. Still no brake lights, a friend suggested that we trace the brake light wires, but don't know which ones they are. Need a wiring diagram. Can you help or any suggestions???

I had the same problem on my 1991 GS. The wire to the brakelight switch had come loose at the pedal. Gently tug on the wires going into the brakelight switch on the pedal and see if one just falls out. Mine did and after reconnecting, I had brakelights again.

What you need to do is where your brake pedal is follow the flat piece up into the dash about 4 or five inches now depress the pedal look where the gap is when you pushed the peddle down to when it was up you will see a brake switch mounted sideways how it works when you press down the flat skinny part of the upper pedal goes down releasing the button out when you let it back up it closes the button back up to kill the power

Hope this helps if this information is helpful please give me a good rating. Thanks , Randy

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