1992 Chrysler New Yorker NO POWER TO ANYTHING

88,000 miles. New battery - just had battery checked today to make sure it was not the problem. There is no power to anything. Lights, horn, power locks, trunk won't even finish closing. Battery connectors were cleaned. Used key to lock/unlock to disarm security system. What connection(s) can I check to see if there is a simple fix to this problem? Thank you so much for your help. P.S. Guess it probably goes without saying that the engine doesn't crank. Not even a peep.