Spal fan wiring questions

[130fe]

Does anyone have a good schematic for wiring in 2 fans (with PCM fan triggers) and a trinary switch using 3 relays?

[Larry R]

This schematic is the way my two Spal fans are wired. I am using two engine mounted temperature switches of different values to operate the fans; lower temperature controls series wiring and higher temperature controls parallel wiring. I don't see why one couldn't substitute a PCM source in lieu of the two temperature switches. This system works well.