Got the Beck/Arnley, Part# 2011614 switch. Look around on ebay for a good price with free shipping. Got the connector here: http://www.cycleterminal.com/mt-series-090.html
. The connector works great. I ordered 2 of them to get past the $5 minimum. Shipping was cheap. Got 2 connectors, shipped for under $10. Connector is completely sealed and latches onto the sender. There's a left and right hand version based on where the locating thingy is on the switch. I ordered MT090-R and I don't know why this would change for the 2011614 but as my wallet is getting down to the proverbial 'stems and seeds', I ordered the switch first and compared before ordering the connector. I've seen the connector on Amazon for a $12 or so apiece. So if you're flush.......
Here's a pic of the switch installed with the connector on it. I also drew up a schematic for wiring in a Bosch/Tyco relay. You NEED the relay. In the wiring diagram, black lines denote existing wires and orange lines are new wires you'll add. Dots are splices. The black wire between the fan and switch must be cut as shown. I've noted the wire gauges I'm using. The wires to the fan should be at least 18 gauge. The wires to the relay coil (85 & 86) can be 22 or larger.
Oh, one other thing I reckon you ought to do: lube the o-ring with something (I used Sil-Glide). When you tighten this puppy, the o-ring has to slide against something and it has the potential of getting a bit roughed up if not slippery.
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