On your windows, the system uses 2 thermal circuit breakers on the 99s. Trouble is if one pops it will kill power to all windows so they are good. All windows use a common ground so that's good. You probably have two bad window motors. Not at all uncommon. They are not built to last. Pull the interior trim panels, disconnect the motor connector and check for power and ground. If it's there change the motor. The motors can be had for $30. A few bucks at a junkyard.
The good news? Chrysler didn't get around to integrating the power windows into the data bus on your 99 as they did in later years. It could have cost you some big bucks.
Last edited by Cougar41; 08-22-2011 at 11:27 PM.