Depending on the build year the fan circuit has quite a number of variances. The main power feed to the fan circuit is straight from battery (terminal 30).
Theses are the circuit variations for 16V's. For 8V's from 1984 up the 1985/89 16v circuit applies. For the very early 900's I don't think there was a fuse in the circuit and the thermoswitch is fed straight from the battery.
We know it's not a very early car because it has an intercooler. And we can guess it's not an '86 because it has 9004 headlights. Then we look at the title of the thread and see it's a 1989, so fan, fuse, relay as I indicated.