Last week I lost my left turn signal, blinked fast. Now I have no turn signals,hazards or brake lights. Replaced fuse and it was fine for about 20 miles. Blown again.. Heeelp! 99f150

 

check for chafed wires. you could be arcing and shorting the system, and or check the grounds for the same issue. Im sure another member will pipe up with something a little more in depth than that, but that would be my first line of attack.