1989 Toyota Corolla Power goes off

There is a fuseable link in your junction block that feeds all the circuits you describe. Problem is, the drawing doesn't tell me exactly where it is. I'm 90% sure it's under the hood on the fenderwell. Being the problem is intermitent, I would guess the socket for this link is probably burned and making intermitent contact with the circuit in question. So, your looking for a burned connection area in a fuse block. Hope this helps.

HELP -------I checked the engine compartment fuse block that is located next to the battery on the fenderwell. I did not see any burned connections. However in the engine fuse block next to a black relay listed as "main engine" there is a two tiered round metal relay that gets really hot and on the top of it is written "Fan No. 1". I also checked both fusible links up next to the battery, 80 & 30 amp, neither showed any burned connections.

What would you suggest I replace or do. This happened before and I cleaned the blades on the "main engine" relay and it worked good for a long time. There is no burned connections around it either.

The cheapest fix is to go to a junk yard and find an 89 Toyota Corolla/Geo Prizm, remove both fuse blocks, (they are held down with 10mm bolts and the connections unplug).

Buy both the larger one to the rear and smaller one. I have purchased them for $10 each.

This will give you all the relays and fuseable links you need. These are very expensive from Toyota, some relays are over $100 each.