Have just bought a 2004 freestar, and upgrade from a '92 Aerostar, hope this one is a good as the last.

Havinga problem with the parking sensor... When I start the van, the sensor appears fine, and I can turn it off and on. Once I put it into gear,reverse or drive, it switches off by itself, and won't turn back on untilit's shut off and restarted.

Not sure how to go abouttackling this..Any ideas on this one?

 

My 04 did the same thing 3 different times. 1st two times a had failed sensors due to winter crud/salt and the 3rd time the dealer replaced the control module for the back-up sensors.

 

Thanks for the reply, will reaserch on how to test the sensors, and go from there.

 

Had a chance to look at the sensors, any ideas on the best way to get at them? Do I have to remove part of the bumper, or can I get at them from the outside...?

Regards,

 

Solved this one if anyone else runs into this.

Boughtnew sensor off ebay, then removed the bumper covering. This was done by removing the screws on the bottom of the liftgate door, and the 2 screws on each side of the rear wheelwells.

Then I simply replaced one sensor at a time and tested it until I found the one that was malfunctioning (it was the 2nd one). I then re-assembled, and working like a charm.

 

Haven't visited this one in a while. My parking system quit working a couple of years ago. Would always turn itself off within a few seconds of the vehicle being placed in reverse. Would stay OFF until the engine was turned off. Well...it just donned on me that after the Dealer dropped my sub frame to perform the torque converter recall, the parking system started working. So, I have to assume that they had to have disconnected a connector that's associated with the system. Then once it was re-connected it started working (cruddy connection for the winter salt?).

Just something for somebody to look at if they have the same back-up system issue.

 

Well...it may have been coincidental, but it was a short lived fix...The parking system is back to it's "Normal" broke senario. So, I just shook my head at the van and said "What ever", I still know how to back up and can still judge distances...