A bad ground wire is the most common cause of turn signals and brake lights not working. The ground wire connection might be corroded.
how do i find the neutral, or clutch switch on a 2003 ford F150?
where is the crankshaft position sensor a bank 1 circuit malfunction on a 2003 f150 at
The headlights in the Ford F150 may have stopped working due to a bad fuse or bulb. Check these and if it doesn't fix the problem visit a mechanic.
Walmart
Ford Dealer can help you. And tell you if there is anything wrong with your 2003 F150.
f150 ignition coil sequence
go to following link you will get the answer: http://www.wonderhowto.com/how-to-replace-brakes-2003-f150/
Only 1 fuse for turn signals--if others are working could be a bad flasher, bad bulb, or problem in steering column
When replacing parts of a car, it is important to know the general cost of the fixes. To replace the ball joints for a 2003 F150 pickup truck, it is going to cost a person $40-$60 to do it on their own.
Check all your grounds
Check your fuses, check for power going into the window motor, exc.