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NISTECH »
https://forums.nicoclub.com/nistech-u7581.html
Sun Jun 19, 2005 7:20 pm
Yep thats the wire tap. yes you should soldier your wires together for good contact, and thinking about the whole A/C relay thing, The blue wire probably does go to the A/C relay to operate the fan constantly or at a higher speed when the A/C is on. The temp sensor allows it to come on for temp reasons since it is wired to the battery. In this set up be aware the fan will remain on sometimes when the key is shut off till the temp lowers on the sensor. It depends on the temp of the cooling system. Of course you could wire your red wire to a ignition switched source, just be sure the suppling wires are of the smae gauge as the fan wires so as not to over heat the circuit.