2006 f150 keeps blowing turn signal fuse

Due to its age and probable high mileage, I would look for damage to the lighting loom feeding the rear indicator and brake lights.

Short circuit most likely in rear light wiring

Fuses blow because there is an overload on the system. If the fuse blows when you step on the brakes then there may be a short in the wiring from the brake light switch to the lights, abs module or turn signal switch. If the fuse blows when you turn the key on then there is likely a short in the wiring to the brake light switch. Basically you will need a wiring schematic to check the wires at the switch and at each of the loads. Also verify that the fuse is supposed to be a 10 amp fuse. Hope this helps

you have a short in one of the light sockets or a worn wire from the wiring harness. could be the flasher assembly. are the turn signals different bulbs from the brake lights? Does using the brakes blow the fuse? (Rear lights or brake light switch on brake pedal). left or right turn signal blowing the fuse will tell which side has the short. 4 ways only, replace the relay.

Stop lamp circuit discription

Stop Lamps
The STOP LP 25-amp fuse in the underhood fuse block supplies battery positive voltage to the normally open stop lamp switch. When the driver presses the brake pedal, the switch contacts close and battery positive voltage is supplied to both the STOP 15-amp fuse and the center high mounted stop lamp (CHMSL) 10-amp fuse in the instrument panel (I/P) fuse block, and to the turn signal/hazard module. The turn signal/hazard module then supplies voltage to both of the trailer rear turn/stop lamp supply voltage circuits. The voltage from the CHMSL 10-amp fuse is to the CHMSL and the trailer jumper harness. The voltage from the STOP 15-amp fuse is to the stop lamps, throttle actuator control (TAC) module, and the cruise control.

I think The turn signal/hazard module has something to do with the lights flashing .From looking at a wiring diagram B+ voltage from the STOP LP fuse 25amp in the under hood fuse box supply's the brake light switch , from there it feeds B+ to VEH STOP fuse 15amp and VEH CHMSL fuse 10amp an to stop lamp switch signal to the turn signal flasher module which is suppose to control the trailer stop lights . Do you have a connection for a trailer hook up ?
Remove both LT an RT TRLR fuse's both 10 amp from the I/P fuse block an see if the problem goes away .

Do you tow a trailer ? Check the trailer connector for corrosion !

COULD BE BLOW FUSE.FAULTY TURN SIGNAL SWITCH OR FAULTY TURN SIGNAL FLASHERS WHICH IS LOCATED FUSE / RELAY BOX JUST LEFT OF THE STEERING COLUMN.

wich fuse, more specific, maybe the problem is with the electrical circuit on the tun lights switc, or it could be on the lights bulbs on the back of the car

You say the rear tail turn signals are not working are the fronts working? If the fronts work and the rears don't then you have a wire issue. Check the grounds for the tail lights or check and see if a trailer wire harness was put in by splicing the wires. Also check for brake lights and see if they work should be same bulb. If the fronts do not work either check fuse 18 in the fuse box should be a 10 amp or check brake fuse 2 which is a 20 amp

try a #20 amp fuse

If fuse keep blowing, then it is a short. If fuse does not blow, then it is a broken line in the brake light wires, follow the wires down to the fuse. Buy a tester, which costs couple of dollars, to test were is power and were not.

Regards