I'm hoping somebody can help me.
Last month I had my windscreen replaced with a non-OEM (though supposedly OE-spec) unit. Since then I have been having trouble with my rain sensing wipers. I've tried two sensors and they display largely the same symptoms:
1) If I do not activate the wipers the automatic lights work perfectly.
2) If I activate the automatic wipers they work properly for 5 - 10 minutes (the wipers don't move unless the sensor 'sees' water, such as from a spray bottle).
3) After around 5-10 minutes of the rain sensing wipers being activated the module seems to stop functioning... the wipers revert to their intermittent setting, and the headlamps come on irrespective of the actual conditions. If I try to initialise or query the RLS module via INPA it won't communicate (it will communicate if I turn the car off and back on).
I'm a bit stumped as to what to try next. The symptoms don't make me think that the new windscreen is to blame, but the module worked fine before it was installed, so I'm a bit stumped.