Fan control switch

[dart67]

Where can I buy a fan control switch for a 74 duster non ac (3 prong)?
Thanks

 

[3404speed]

A/C & Heater Blower Motor Switch Part Number: ECH HC201
Product Line: Echlin Ignition Parts
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$18.00 /ea At Warehouse
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[dart67]

It has 4 prongs will it work with mine where I have 3 prongs?
Thanks

 

[3404speed]

hmmm dunno. May have to look around in the garage tomorrow or read a couple different wire diagrams to find out what the fourth tab is for.