Dashboard lights ALL ON (what the deuce???)

All the idiot lights are lit up on my dashboard. Now, I can't imagine that at a single moment, my brakes, coolant, light bulbs, and battery all failed. But, that's what the warning lights are showing1 All at the same time! And the car is running just fine - what could it be???

Any ideas? (Man, I swear I have seen this failure once before, some years back, I just can't remember...)

Thanks,
Pat

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