Rain Sensing Wipers

IndyDave said:

I have a 2020 Limited (19K miles) I purchased used. I discovered the rain sensing wipers did not work. Three times to dealership. Second time the module (?) was replaced. Still would not sense rain. Dealership thought defective unit and replaced again. The rear window wiper activates intermittently, no pattern. When I turn off the Expedition, during rain & exit the vehicle I leave the the front wipers in "Auto". When get back in, start it, during rain the sensor does not turn on the wipers for miles, maybe 5 minutes during rain. Back wiper still intermittently activates w/o touching rear switch & it is ALWAYS in the "off" position.

Sometimes in very light rain the wipers seem to run at a normal speed and then they will run crazy fast for 20-30 seconds and then slow back down to the normal slow speed.

I have had 3 other Expeditions with rain sensing wipers, all worked perfectly.

Suggestions please?

Click to expand...

IndyDave said:

I have a 2020 Limited (19K miles) I purchased used. I discovered the rain sensing wipers did not work. Three times to dealership. Second time the module (?) was replaced. Still would not sense rain. Dealership thought defective unit and replaced again. The rear window wiper activates intermittently, no pattern. When I turn off the Expedition, during rain & exit the vehicle I leave the the front wipers in "Auto". When get back in, start it, during rain the sensor does not turn on the wipers for miles, maybe 5 minutes during rain. Back wiper still intermittently activates w/o touching rear switch & it is ALWAYS in the "off" position.

Sometimes in very light rain the wipers seem to run at a normal speed and then they will run crazy fast for 20-30 seconds and then slow back down to the normal slow speed.

I have had 3 other Expeditions with rain sensing wipers, all worked perfectly.

Suggestions please?

Click to expand...