I am retrofitting a 350 TPI into my '73 Pickup. I'm working on the wiring harness and I had fan questions. I do not have a Camaro dual fan setup I'm using some universal fans. I'm sorting out the harness and it looks like the dual fan setup has an Aux fan relay controled by the AC switch and a main fan relay controlled by the ECU. I do not see where these setups go into the factory fan assemblys and I cannot find an Aux fan relay listed in any of my O'Reilly computer system. It almost seems as if the main engine wiring harness should plug into something on the fan setup. Like I said all I have is a harness so I dont have a car to look at. Any pics of relays or wiring setups for the factory layout would be helpful. Thanks.

 

Also has a mech switch in parallel with A/c switch controlling Aux fan
A/c switch also inputs to the computer so it can adjust idle when A/c on