Turning signals are not working 2004 mustang

Question moved from Washing Machines.

Check Fuse 14 before you start ripping wiring out.

Ford Mustang (2005-2009) fuses and relays

https://fuse-box.info > ford > ford-mustang-2005-2009...
Here you will find fuse box diagrams of Ford Mustang 2005, 2006, 2007, 2008 and 2009, get information about the location of the fuse panels inside the car, ...

..

try turning on the hazards, if they work then it is probably the signal flasher gone bad. these are 2 different flashers they look the same. you didn`t say what car/year you have so I can`t tell you were it would be located. if the hazards don`t work check fuse if this is good then it could be the turn signal switch that is bad.

I assume the fuse has power if the hazards work.
The third brake light skips the turn signal switch, the regular brake light circuit goes thru the turn signal switch.
Do you have power going into the turn signal switch on the red lite green wire from the brake switch ?

each outlet has its own fuse look for the other one

CHECK UNDER HOOD FUSE BLOCK FOR FUSES AND CIRCUIT BREAKER AND RELAYS....IF NOT IT IS AN ELECTRICAL DIAGNOSES. USE A MULTI METER TO SEE IF YOU ARE GETTING CLOSE TO 12 VOLTS AT SOURCE!
***NO EASY FIX...ALMOST EVER!!!

pull out 1 fuse at a time and look at the wire trace inside if it looks broken or black, replace it. if it looks good. put it back in and keep trying

The turn signal switch and 4 way flashers have the relays built inside. If fuses and flasher is good, then switch is bad.

YOU HAVE TO REPLACE THE TURN SIGNAL SWITCH.BECAUSE WHEN IT GOES OUT.SOME TIMES YOUR DIMMER SWITCH STOP WORKING.IF YOU GOING TO FIX IT YOUR SELF BESURE TO.DISARM AIR BAGS FIRST.

Check the switch on the brake pedal. They go bad from time to time and are usually cheap to replace.

You did not say if its one turn signal or all turn signals that dont work. It could be a bulb.One bad bulb will cause the others not to work , normally one side of the car.Mostly left and right sides of the car is on a different circuits.
If it is all of them not working , it could be the switch in ur steering colum thats bad.Its the switch that the handle u move to turn the turn signals on and off.You would normallytake off the steering wheel to fix that switch.But its a bigger jpb , a pain.So make sure its not a bulb or a fuse first and make sure ur useing the right amp fuse.If its not that.Then id check the conection where the bulb screws into the socket.There can be corrosion there and that can cause a bad conection.Besides a bad bulb thats always been the number one reason my turn signals have not worked.You just have to keep eliminating the possibilities. Keep checking.