[MDPotter]

Fans are rewired. Here's the sequence of operations: when coolant temp reaches 195, fan #1 comes on full speed. When coolant temp reaches 205, fan #2 comes on full speed. When A/C line pressure reaches 254 psi, trinary switch closes and sends ground to fan #2. I did this because I found out my Spal fans are not 2-speed fans and running them in series at 6V instead of 12V will wear them out. This is actually a much simpler wiring schematic so I didn't mind. The resistor and diode are important because the PCM will see a ground through the trinary switch without those components and throw a code. The direction of the diode (basically a check valve) is important too. We put it in backwards the first time and the electricity could not flow through the diode. For the ignition source, I used the electric fan wire from the American Autowire harness. I posted a link to the diagram below for anyone that would like it.



Speartech Fan Relay Wiring W TRINARY SWITCH.pdf