Check the fuses. Don't just eyeball the fuses, remove each one and make sure the metal strip is intact. If they haven't been replaced in the last 10 years, replace them all. ACC blower fan might have a separate strip fuse in a small plastic box outside the main fuse box. It'll have a 30A fuse that looks just like the 80A fuse in the glow plug relay.

Sixto
87 300D