I'll do that, but I meant testing the sensor itself (like maybe using a volt meter?), not necessarily the sensor system. I know the sensor system doesn't work, but I don't know if it IS the sensor, or if something else in the system could cause it to go haywire.

I'll restate what it does in the rain, since my first post wasn't too clear:

- Swipes twice in a row
- Does not actually sense rain (speed and frequency doesn't change with how hard it's raining)
- Rotary (interval) switch does nothing
- Frequency changes with vehicle speed