Yes. The module will sense moisture on the windshield and the wipers will start. The wetter the window, the faster they wipe.

Thanks, I'll give that a try. The last windshield that was installed may have been treated with something because at highway speed, I also generally don't need to use the wipers.

What if you're going through a car wash?

You can actually turn them off. These only work if you have the wiper control set to one of the 'delay' settings.

Wait, are these like mine, where you have to turn them yourself, and turn them off when it stops? All mine do is trigger the sweep earlier than the setting normally calls for.

Or do they activate themselves completely independently when the rain starts, and automatically shut off?

If they are 100% automatic, I gotta see about swapping to the newer module...

the 01+ Rora and Lesabre module are different than your PA, and will require a different mount to the Windshield

you can have it off totally, or in the auto position with the WS wiper arm in the delay position

What year is your PA? I'd need to dig up the wiring diagrams and technical info to determine the differences. In the newer ones there is bi-directional communication between the wiper motor module and the moisture sensor using pulse width modulated (PWM) signals. If there is an interruption in the link, the wipers default to the function of the delay setting. This way, as long as the communication exists the sensor will take control and it should be fully automagic. Your configuration may differ I'll have to check to see if your wiper motor module will support these functions.

98, see siggy...
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Yes, well I was just testing you

My 03 Aurora has these and I love them. Set to delay, and forget about it. Cool option I wish I had on my other cars.