Duster should have been a DEMON! Cranking issues!

"Dash light fuse."

This is a bit of a trick!!!!!

That fuse ONLY has power when...............

The tail circuit fuse is good..........

The headlight switch is in the park or head position and the tail lights actually work.........

The dash dimmer is twisted "somewhat" to the left (ccw)......

The dash dimmer circuit gets power from the tail light circuit, and that fuse gets power from a tan wire coming FROM the dash dimmer circuit.