95 Aurora Dash lights out

Driving along with headlights on and ,, bingo , dash lights go out.
This includes radio, air direction (vent, floor, defrost) lights.
Head lights work fine and auto on/off works ok. Dim lights and turn signals OK
Checked fuse # 24- 60 Amp
Labeled= Electronic level control/instrumen Panel
Located in rear Compartment Pass side fuse Block. It's OK

I am at a loss as to where to look next. Any suggestions will be greatly appreciated..