Rear parking sensors

[jjfx407]

I am having a problem with my rear parking sensors. When I put the shifter in reverse quickly the parking sensor sound activates. If I put the truck in neutral after the sound activates then back to reverse the sound goes away and the sensors act normal. Also if I place the truck in reverse gently the sensors work fine. I don't think the sensors on the bumper are bad since I checked them and hear the rapid clicking sound while in reverse. I'm not sure if the parking sensor computer is bad or if its something in the shifter. Any help is appreciated.

[NYC F-350]

My truck acts the same way, but only after a rain. After a day or two its all good again.

[Term3]

I believe AE will tell you which one is screwed up. I need to fix mine up but was wondering if the sensors from the newer trucks which are almost flush whereas my Excursion has the ones that stick out lots.

[NYC F-350]

My 06 sensors stick out a bit, not flush.
The "listen for the click" test worked great for me. I had 1 sensor out, replaced it. One week later, another, two weeks later another one went out, so I replaced the remaining two. No problems since except for the "beeeeeeep" tone after a rain storm.

The click test:
Set E-brake
Put truck in reverse
Stick your ear close to each sensor
listen for the rapid "click-click-click"
If the clicking is slow (or does not click at all), the sensor is junk.