Dead Caravan gauges

Thanks for the quick reply there, Ernest!
I guess I should have mentioned that the fusebox was the first place I looked. All fine there, 'tho' I don't recall finding a fuse specific to the IP, which surprised me. Also cleaned the battery posts and clamps, and checked the voltage, engine off and on, to make sure the alternator was charging, and all is nominal.
When you suggest a resistor, do you mean, on the IP circuit board or in the BCM?

Still striking out, Ernest.
I repulled the IP, completely went over the board, no joy. The basic illumination lights work, along with the dimmer control, but that's it. It just seems to me that there must be a common thread to all these symptoms. Again, they are;
No gauges
No odometer/ tripometer
No turn signals/ hazard flashers
No system check lights at pre-start (key on, eng. Not running)
No warning chime for key left in, lights left on
No door ajar warning light
No seat belt reminder light
But,
Headlights work, hi and low
Climate controls work, inc. AC
All fuses appear good
No recent traumatic events, other than that the rear wiper has gone occasionally dead on me in mid stroke, but is working now
Engine seems to run fine, not in limp mode

I see two different blocks, or modules under the dash. One has six different plugs going into it, and is tight against the firewall. The other is smaller, hung off a projection of some sort, and appears to have just one main cluster of wires going to it, with a smaller connector off to one side. No part name on either on, no obvious disturbance to either one, wire conditions all look good. But with all the wires so thoroughly wrapped, tracing them thru the harnesses is nearly impossible!
Surly there's a smoking gun commonalityy obvious to someone, somewhere. Who's been there, done that?