After posting I realized that the fuse socket are numbered on the front and the pins on the back have numbers that correlate.
My blower has been working.
Did the heater pin burn up because the circuit breaker did not open?
new circuit breakers might be in order for insurance.
Here is the exploratory surgery:
The image in my OP shows 4 round black dots in the corners of the block. They are plastic rivets. Drill them gently not to go to deep. Just drill off the black.
Then gently pry the 8 white locking tabs from the black housing.
Then you get this.
WARNING: take pictures as you go because, sh*t gets confusing and thing fall out. Pieces will fit into the wrong place but the assembly will only go together one way.
The whole thing splits into 3 layers
I cleaned everything with battery cleaner and compressed air and made sure there were no more burnt pins.
Here is the carnage.
I tried several times to clean it and re-tin it with solder but not luck on getting the solder to stick. So i ended up just cleaning it with a wire tooth brush.
While I was in there I put a drop of solder on all the female sockets seen in the bottom of the picture as insurance. There are about 10.
I was able to replace the female side of the burnt pin with a standard blue quick connect. I crimped and soldered in a short section of new wire. Old wire was pretty rigid from all the heat. Sorry no pics as it was almost midnight.
I also packed all sockets with conductive grease to keep dust out and improve conductivity.
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