I just got my '95 Buick Park Avenue. I bought it knowing that the power locks don't work. However, when it rains, the following things have happened:
1. power windows may stop working.
2. when pressing any electrical function, the lights dim and the engine stalls (only while out of "park" gear.
3. after car dries a little, everything is normal again.
4. The only repair I did was to fix the heat (replace thermostat, flush radiator and replace hoses).