Trying raising the tilt on the steering wheel all the way up. Some times the connector for the MFS ( MultiFunction Switch ) pulls apart.
This is a 16 pin ( 4 rows of 4 pins ) connector behind the knee panel, Pull the knee panel ( screws on the bottom, plastic tabs on the top ) and check the connector. The harness side towards the truck ( not going to the steering wheel column ) pull up a bit of slack and zip tie it to the knee panel frame. Pull the connector apart and check the pins for discoloration. Use emery or an eraser to clean the pins. If the connector tab has been warped, you might have to zip tie the connector back together.
Not unheard of that this connector pulls apart, it was not installed on the 04+ MY F-150s, I can only assume to remove this issue.
My 02 Ranger had no brake lites. Pulled top & bottom covers off steerring column and found loose wire on back side of connector just behind 4 way flasher switch.
Do the turn signals work? I know the brake lights are linked through the turn signal switch on my Escort. If the turn signal switch goes bad, my brake lights won't work either.
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I would check the ground wires first. Also are you able to find out if there is power to the brake switch?
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