What would cause the backup sensors to stop working on a Ford Windstar - Freestar?
Answer back up sensors
It was just a few months after I bought my 99 Windstar that I
had problems. It always seem to happen after it had rained and when
I got to the dealer the problem went away. After numerous trips
they seemed to finally resolve the problem.
I was told that they used some kind of marine sealant on the
sensors. It would appear that when it rained or after I washed the
van the sensors would short out. That seemed to work for about 2
years now the problem has returned. The sensors seem to work after
a few days of no rain. I think the sealant has broken down.