wiring 76 Ranchero

I have problem with the dash cluster lights not lighting. I replace the circuit panel with new, replaced all bulbs, replace light switch. All other dash lights work except the ones that light up at night. Fuse is good.
Wiring all looks good. Is there something I am overlooking

Check the feed before anything else. On Fords of that era, the dash illumination doesn't get power straight from the fuse box. It comes out of the dimmer rheostat built into the headlight switch, and on the 1971-73 Mustang wiring (a near match to your '76, not your exact diagram) the instrument lamp fuse itself is fed from that rheostat. So the fuse can test good and still have no power going to it. That would explain why your indicator lights work and only the night lights are dead, since the indicators don't go through the dimmer.

Here's how I'd run it down, using a test light or meter:

1. Headlights or parking lights on, and the knob turned all the way to full bright.
2. Check for power on both terminals of the instrument lamp fuse. Also look at the back of the fuse block at that slot for a rusted or loose terminal.
3. No power going into the fuse: the problem is between the switch and the fuse. Check the switch connector, and keep in mind that a new switch can be bad. One Mustang owner had a switch that ran the headlights fine but put nothing out on the dash lamp side.
4. Power at the fuse but not at the cluster: follow that wire to the cluster connector and make sure the connector is fully seated on your new printed circuit.

The rheostat side of the switch is the weakest part of that circuit, so if you find the break at the switch, don't be surprised that it's a new part.
Dana