Back up sensors

[Sahrens0202]

Hey I pressure washed under my rear bumper and they quit working. Unplugged all of them and none of the connections were wet as I had put dielectric grease in them when I put the bumper on. Called ford and they won't tell me if there is a way to find out if it's a bad sensor or short in wiring or what. So, is there a way to diagnose it myself? Or do I have to take it in? Thanks!!

 

[BigBluediesel08]

Put the truck in reverse with the hand break on, or wheels chocked.. Go out back and get close to each sensor, you should be able to hear a beeping sound. The one that doesn't beep, is the bad one.

 

[Bigboytoys]

If it just stays a solid beep when in reverse, with nothing behind the truck, you have 2 or more dead sensors and the system gives up.

I just replaced all 4 in my truck for 40$ plus a bit of shipping, working perfect now.

 

[Sahrens0202]

No, the light comes on saying off and never beeps. Where did you get them for that price?

 

[BigBluediesel08]

I have the same issue. Could never find the problem, so I let them be. You can check ebay for sensors.

 

[Bigboytoys]

Yes I bought them off E bay. The issue could be the main sensor control box but mine did the same thing, just turning it's self off without a constant beep a few times so a $40 test, and having 4 new sensors in the end isn't that expensive of a try compared to a new control box.