Why does fuse keep blowing when I turn, turn signal on?

the turn signal circuits are shorted,,the fuse blowing saved you from a fire.(burning harnesses)
faili on left or right or both and HAZARDS? SORRY 3 fuses to learn that.
USA answers, Chevy S10 only
there are 2turn fuses, I see, in the schematics.
LT-turn and RT-turn, so now you know which side is shorted. just a glance and bingo , side. bad know, cutting work in ;1/2.
but, there is 10amp turn fuse too, that runs the turn flasher module
so 4fuses, turn left and turn, main and haz main.
this is bad.

any thing in this whole turn system can blow fuse turn main, BLK.
but learning if only one side fails ,is great moment,
if both fails, the problem is this module or the turn swtich is shorted.

Does the fuse blow on both left and right sides,or just blows randomly or as soon as you put the new fuse in?
Does it have tilt steering?I would check the wiring in the steering column to start.

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.

Have you unplugged the turn signal switch to see if the short is inside the switch or harness ?

A mechanic would disconnect the turn signal switch and check the circuits for shorts to ground.

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.

try putting in a 40 amp fuse in. its worked for me in the past

I am thinking you might have a electrical short in your steering column

It sounds like the fuse is doing what it is supposed to do, and burning out when there is a short circuit. Check the wiring from the fuse block back to the lights and pay special attention to the trailer connection.

This is more than likely caused by a Bad Turn Signal Switch Housing inside the Sterring column. The one that the Handle is attached to and Wraps around the Sterring Shaft on the Inside of the Column.