There are 2 knobs in the gauge cluster. Turning the left knob adjusts the dimmer, pressing the left knob resets the trip meter, pressing and turning the right knob adjusts the clock.

The main fuse box is beside the brake booster where you found it. The fuses can go bad while looking intact. There is an 80-amp strip fuse in the glow relay and possibly a 30-amp strip fuse for the AC blower in its own case just outside the main fuse box.

Sixto
87 300D^2