rewiring the fan relays?

Hi all. I am beginning the project of installing a new radiator and going to two spal sucker fans. I, of course, wish to wire in two new relays for the fans. I have a 1974 "L" with OEM relays and wiring. I have read the excellent articles posted online, however am still at a loss as to the specifics of how to replace the OEM relays. I understand that the pinks coming from the fuse box are the existing power and understand that I can remove them. My question surrounds the balance of the wiring running into and out of the OEM relays. How do I go about tracing them to see what their functions are, or is that even necessary. Is it all redundant at that point and can be removed. I"m afraid to get in there and start removing wiring that I may need. Any and all advice is greatly appreciated.

8/11/134:49 PM

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