Electric Fan Question - Wiring

Nut shell

Bat plus to cir brkr.
Cir brkr to relay
Relay to fan
Grounding for fan to good ground.
Feed from ignition like the feed to ignition coil before ballast resister to relay coil
If relay is not internally grounded ground other relay coil terminal.

All this assumes you know which terminals on your relays and cir brkr do