electric fan shorting out

[ualbert@juno.com]

Well, I started to investigate the possibilities why the electric fan on
my '79 is overheating on the wire. The wiring diagrams are a bit
confusing. On the relay unit, there's 5 slots but only 4 of them are
being used. One of them has 2 wires in there. Is that just how it was
used on this model, as this relay is being used on other car models?
Another weird oddity I ran into after my car overheated was with the
juice on, the fan started after about a 20 second delay. Arrgh