My just have just started to behave strangely. Intermittent and high speed settings work fine. When I turn them on regular speed constant, they'll wipe for 3-4 strokes, then stop. The wipe for 6-7 stroke then stop. This continues to repeat with no consistency. They may work for 5 minutes, then stop. I've looked it up on the internet and it seems there are several modules. One of them I believe they said was soldered into the fuse box. Looking for any suggestions.