Something has to be shorting out. I was recently playing with some more switches and found out that you cannot plug a switch from an AT into an MT, and vice versa. The pinout for the plugs are different and will blow your interior lights fuse, which is also a pain in the **** to change.
If you are still using your original switch, it has to be shorting somewhere in there.

 

Pretty sure it's the LED's shorting it because I just unplugged them from the switch, plugged the switch back into the car and nothing shorts. Mine look like this -

 

This is nice!! I'm doing this soon. It's the little things that makes us feel good

 

sweet! wish i would have seen this sooner

 

When I tried this, my taillight and dash light fuse went out lol. I have a feeling it was the resistor on the led

 

Again, it's time for me to be that guy that revives an old thread. But when taking apart my switch, all the parts sprung out on the ground so I didn't get to see how the slider is supposed to look with the three prong attachment. (see picture) So after blowing three fuses from improper reassembly, I figured out that this is how it was supposed to look