My powersteering locked up twice in wet weather

easy fill resevoir then turn steering full lock left to right about twice ,check fluid level ...job done

Window motor have ecu built in.good luck.replace a new window motor most likely

ignition wires and coils are very common replacement items on these vehicles, damp and wet weather are sure signs of misfires, stalls and no start conditions, have your local technician test for coil/wire arcing when wet.

replace traction control/abs sensors, and drop the fuel tank and replace the fuel filter. The fuel filter has probably never been replaced because of its location. You will NOT resolve the problem until you change the fuel filter.

Before you replace the injectors have them do an injector balance test. Normally wet weather does not effect fuel system. Sounds more like you have a crank or cam sensor acting up.

Spray the door locks with penetrating oil, both sides, where the door latch-then open/close the door many times (12-2- times) to loosen the mechanism, it will fix this, a very common issue on Mark VIII's

Programming
When
Key added or replaced. System malfunction.
How
Driver's door open and key removed from ignition switch. Insert key into ignition switch, then remove it. Within 5 seconds: Insert key into ignition switch, then remove it. Within 40 seconds: Close and open driver's door twice. Insert key into ignition switch, then remove it. Within 40 seconds: Close and open driver's door twice. Insert key into ignition switch. Close driver's door. Switch ignition ON and OFF once to program a new key code whilst retaining the original codes or twice to program a new key code whilst erasing the original codes. Remove key. System should now lock and unlock vehicle, once or twice depending which mode has been selected. Carry out the following button procedure within 40 seconds: Press key lock or unlock button once. Within 3 seconds: Press same key lock or unlock button once. System should now lock and unlock vehicle.
NOTE: If system locks and unlocks vehicle twice, programming procedure has not been completed. Repeat button procedure.
If required repeat button procedure to program remaining keys.
NOTE: To exit programming mode: Open driver's door. NOTE: A maximum of 4 keys can be programmed

This will work providing printed circuit is not damaged in remote

A cause for that would be an oxygen sensor getting wet, the one on the inlet side of the catalytic converter.

try double clamping it put on 2 clamps instead of just one and see if that wont help

I sounds by your explanation, that the belt which drives the alternator is slipping when it gets wet.
When this happens the alternator stops charging the battery, and when battery voltage drops the engine cuts out and won't start due to not having enough current to supply electrons as well as starter motor.
Have the belt tension checked, as well as charging output of alternator, should fix it.