Does it blow as soon as you install the fuse or does it happen when you try to use the brakes or the left signal?
If it happens as soon as you install it, we have a dead short. Meaning, power is going straight to a ground.
Here is what I need you to try. First, disconnect the brake light switch and see if the fuse still blows. I attached a pic below showing the switch and how it ties to fuse 13.
If you look at pic 2, I circled the brake light switch connector which is at the top of the brake pedal. Disconnect it there and see if the fuse still blows.
Here is a link you may find helpful. It discusses how to test wiring.
Try this and let me know the results.
Images (Click to enlarge)
Thursday, December 3rd, 2020 AT 7:32 PM