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The brake lights on my f150 (1997) are out and the ABS light on the dash is flashing.
I have replaced the pressure sensor on the brake pedal and the brake lights. I have checked the fluid in the master cylinder and checked all of the fuses.
What next?
The hazard flashers, reverse lights and turn indicator lights all work fine.
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Check the fuse box in the cab. The brake light fuse may be combined with other systems on one fuse. In my 97 Ranger, it's fuse space #13.
AL.
the multifunction switch is your turnsignal switch, located on the steering column. It controls your wipers and your turn signals, but your brake lights run through it also. If your truck has a third brake light make sure that it is working. If your third brake light is out also than your multifunction switch is not the problem.
Is there power going into the brake lamp switch and is there power coming out of the switch when the pedal is depressed? If the wiring is broken going to the switch then the fuse would be good but switch is not getting power, or not transmitting power through the brake circuit. Look at the wiring closely, especially right at the connector to the switch.