Fuse for instrument panel lights keeps blowing

If you think there is a problem with instrument cluster, unplug the instrument cluster, see if it still blows the fuse. Could be a wiring circuit problem, somewhere? Maybe fuse box issue?
Sometimes, I use a test light in place of the fuse, to keep from blowing all my fuses. If the test light comes on, the circuit is going to ground, somewhere. If the instrument cluster is unplugged, then hopefully, that is ruled out.

It isn't the ground; if you lost the ground, it wouldn't be blowing fuses-it wouldn't be doing anything.
There may be a short in the panel, or in the wiring to it. You will need to pull the instrument cluster out to investigate. If the wiring and connectors look good, probably need a new cluster.

this is usually due to the switch wearing out, replace switch or remove switch and put jumper wire straight from 12 volt supply to the high terminal, if you prefer to have high, switch is typically 12 dollars and easy to replace.

Pull the electrical connector to the visors out of the headliner and disconnect it from both visors, see if the short goes away.

So the blower doesn't blow at any speed?

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

You replaced the blower control module or the blower control panel on the dash? This has automatic temp control right?

Ford Full-Size Vans 1989-1996 Repair Guide
The fuse panel is located on a bracket on the driver's side of the instrument panel or, on some RV models it is located on a bracket attached to the brake pedal.




The fuse panel is located on the driver's side of the of the van, below the instrument panel



Typical power distribution box, which is located in the engine compartment

I hope this helped (remember rated this help) Good luck.

YOU NEED TO REPLACE INSTRUMENTAL PANEL - HAD THE SAME PROBLEM WITH MY 1989 SSE- TAKE THE COMPASS AND DIC OUT OF OLD PANEL PARTS ARE PROBABLY STILL GOOD

check the earth on ur headunit it may be earthd to the rong thing

yes there are fuses but there will be other instruments running off the same fuse! If everthing else seems to be fine than i would go directly to the blower located on the fire wall and change it!