Back-up Sensors not working on 2004 Explorer

Posted in the Ford Explorer Forum

Glenn

Pasadena, MD

#1 Jul 29, 2011
The backup sensor stopped working and the switch on the dashboard appears to be in the off position when shifting into reverse with the gear selector on the column. The tranmission is an automatic. When the transmission is in any gear other then reverse I can turn the backup sensor on and off with the switch on the dash but as soon as I move the gear shift selector into reverse the backup switch goes into the off position and the light come on showing it is off. Ocassionally I get an intermittent beep as if it was working properly while in reverse and when it does beep for that fraction of a second I notice the light on the switch goes out only during that beep them come back on immediately until it beeps again.
Does anyone know the cause, it seems like it is coming from the switch or wiring in the dash or steering column.
Thanks for any reply.
shane

Canada

#2 Feb 14, 2012
having same problem need an ansewer as well
scottso

Valley Stream, NY

#3 Mar 10, 2013
I know this post is a bit old, but for anyone else experiencing this problem it was a pretty simple fix. After some online research, most indicated that the problem was likely a bad sensor. I ordered two off of ebay for 25 bucks each. Pulled the rear bumper assemly apart and started by swapping out the right inner sensor. Turned the key on and put into reverse and the dash switched turned off as always. Put back the original sensor and swapped the outer right sensor and again put the car into reverse. This time the system stayed active and emitted a steady tone as expected since the bumper was laying on the ground. Hung the bumper back into position and decided to test everything one moretime before putting back together and lucky I did. Tested all sensors by walking across the aback of the car and moving my hand slowly toward each sensor. Found all were working except the left outer that was unresponsive. Pulled bumper back off and replaced this sensor as well and retested to ensure all four were working. SO ultimatelly I had two bad sensors, one that disabled the system and the other simply didn't respond. Everything back together nd working perfectly. Good luck with your replacements.
Ted

Bridgeville, PA

#4 Nov 18, 2013
scottso wrote:
I know this post is a bit old, but for anyone else experiencing this problem it was a pretty simple fix. After some online research, most indicated that the problem was likely a bad sensor. I ordered two off of ebay for 25 bucks each. Pulled the rear bumper assemly apart and started by swapping out the right inner sensor. Turned the key on and put into reverse and the dash switched turned off as always. Put back the original sensor and swapped the outer right sensor and again put the car into reverse. This time the system stayed active and emitted a steady tone as expected since the bumper was laying on the ground. Hung the bumper back into position and decided to test everything one moretime before putting back together and lucky I did. Tested all sensors by walking across the aback of the car and moving my hand slowly toward each sensor. Found all were working except the left outer that was unresponsive. Pulled bumper back off and replaced this sensor as well and retested to ensure all four were working. SO ultimatelly I had two bad sensors, one that disabled the system and the other simply didn't respond. Everything back together nd working perfectly. Good luck with your replacements.
I have a 2004 Ford Explorer Eddie Bauer and have this same problem. Is there a easier way to replace the sensor other than taking the bumper off. It looks like you can access the sensors buy pulling off the black plastic step cover that sits on top of the bumper. There looks like 2 plastic plugs one on each end of the step that you can pop off and access the sensors. The sensors are mounted on a thin molding that attaches to the bumper. Can that be removed to access the sensors? Thanks.

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