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Discussion Starter #1
The yellow and black wires on the fan harness, there's two separate connectors with a yellow and a black wire in them.

I assumed yellow is the hot wire and black is the ground then I spliced them to hook up my aftermarket fans.

Do the ecu automatically monitor temperature on the block then send voltage to these wires or will I have to create my own wiring with my own thermocouple and a spdt relay?
 
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