2001 F150 crewcab, 5.4l; absolutely no problems (70K mi) and then last week the brake lights fail to turn off..they're stuck on....otherwise truck runs fine. I removed the bulbs to keep the battery from draining; Anyone else hear of this problem? possible solution? where is the brake light switch ? any help is greatly appreciated!

gadoc

 

Take a look under the dash at the pedal mechanism. There might be two switches there, believe one wire is lt grn/red and the other is lt grn. Un plug it and see what happens.

 

thanks Bill...I'll take a look

 

I am with bill, sounds the like the switch for the light on the pedal.

 

OK...looked under the dash and found the 5-wire plug on upper brake pedal...first two wires are grn/red and green...unplugged from black plastic module...brake lights still on......must be a short in the wiring harness???

 

Rechecked my 02 diagram and it does feed over into the trailer tow circuit. Have to confess, I'm having difficulty following the diagram. Here is a lin k to obtain the diagrams for you truck.
Go to: search.ebscohost.com
USER: greatfalls
PASS: publiclibrary

Select auto repair, year, make, ect..

 

The wiring diagram should do it...will give you and update in a day or two. Thanks for your help!
David Peed
Columbus, GA