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First of all, installing a different temp switch is possible. Not in the stock location, which probably would require a 14mm switch. But on the left side of your head, there should be unused bungs in the water jacket. These should take either 22mm or 16mm switches. If 22mm, Porsche or VW switches come in various temperature ranges. If 16mm, the switch from a 90's Honda will fit. I use a 92C fan switch from a Porsche. All you need to do is connect one terminal to a Y at the reciever/dryer switch, the other to ground.
If you want it on whenever the a/c is on, then short the switch on the receiver drier, and T the compressor wire to power the coil of the low speed relay. The relay only draws 1/2 an amp.
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