1994 ATX #5 Fuse (rear defrost, climate unit, turn signals) blows instantly every time you turn the ignition to ON. I suspected the ignition switch so I pulled it out and there was some melting on the B-5 pin so I swapped in another one I had and same thing...swapped in a MF switch and flasher unit, same thing. All wiring for each unit looks good and I checked for melting and shorts on the gauge cluster wiring. This is an everytime issue and I got the car like this. I know it can't be the defrost or signals because it is key ON so I suspect the climate unit circuit or the maybe the wiring from the MF switch to the fuse box. Any help would be great, thanks.