there are only 3 switches. They can be dis-mantled easily and are not a complicated mechanism. Mine at 40 years old had wear on the plastic rockers inside that allowed the contacts to dislodge and stick. However, they are all the same so they can be used in place of each other thereby allowing the blower to be the headlight etc. I had responded to your question before asking if the switches were the same in the 84 as in the early cars and what your problem was with them. For daily driver use a quick fix may not work but if it's a once in awhile nice weather car a little lube ( dielectric ) and some cleaning might get you by. I had my worst switch to a point where it stuck only evry 10 applications or so. I did replace them all for cosmetic reasons only recently. I think it was SASCO or Nostalgic. Not $50 thought, They are not perfect matches for the 64 because there are more ribs on the early switch face. Once all three are installed only the sharpest judge would know the difference. Ernie Rizzolo July 2003