I am not familiar with the schematic for the models with breakers. However, on the fuse models (your could have fuses too), the left and right side circuits are complete separate and separately fused. It could be that there are fuses in addition to the breakers. Since both windows don't work and you have swapped the breakers the problem is either the wire from the breaker to the switches in the console or the power feed wire to the breaker. With the ignition on you should see 12 volts on both breaker connections. If this is the case then, with the ignition off, you might try popping the passenger side switches out (you should be able to unzip the shift boot and get a finger in below them and push up). If you turn the ignition back on you should see 12 volts on both the connectors that have two wires (on on each switch). Not much else left at this point.
In the non-breaker models there is another potential problem source that would affect one side and it may be the same for the breaker models. The windows use fuses 8 and 9 respectively. Power is feed into fuse 9 from the load shed relay and it is then daisy chained to fuse 8 (this detail is missing on my schematics). If this daisy chain connect was bad one side would not operate. This will show up on the first test I describe (voltage at breakers).
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