Yep, like madpogue sez trying to figure this sort of thing out without the EVTM is'nt easy.
But from the online diagrams that i found it appears that fuse 1 (brake lights & emergency flashers) is the only fuse thats wired to one of the fuse links.

3 or 4 fuse links ant the positive battery cable are connected together at the starter relay. In a hurry now more to follow. But it looks like you have a blown fuse link.

 

Dogs have been walked so now the wife is happy.
1st thing to do is check at the starter relay and make sure all the small wires are connected. If 1 of them is hanging in the breeze someone might have replaced the starter relay & forgot to reconnect it.
The fuse links will be a fat spot in each of the small wires the one you can stretch with your fingers is the one thats blown. I think the diagram said it was yellow.

 

Wouldn't an '89 have an underhood fuse box? Or are they still on the old-school in-line fusible links? Sorry, I'm not that familiar with the '87-'91 gen; if I'm mistaken about the fuse box, please disregard post #15.

 

No biggie about your previous post. Until i looked at the wiring diagrams i was'nt sure if this 89 used the easier to replace maxi fuses or fuse links. Unfortunately it does still use the fuse links