Greg Ward Posted May 14, 2020 Share Posted May 14, 2020 My rear park aid system will not stay on. After having it checked on it still turns off every time I put it in reverse. I have replaced all four rear bumper sensors. My truck is a 2015 450. Quote Link to comment Share on other sites More sharing options...
YT90SC Posted May 14, 2020 Share Posted May 14, 2020 (edited) Unless it has been struck by debris or physically damaged in some other way, sensors rarely fail. Each sensor has three wires, a ganged power, ganged ground and a signal. One broken wire to any of the sensors and it will be inoperable for safety. They like to get rashed up in the bumper wiring, where the bumper wiring plugs into the chassis harness and where the wiring transitions into the engine compartment/over the fenderliner. You need to at least have the PAM codes read to have a clue where to start diagnostics of the wiring. Edited May 14, 2020 by YT90SC Quote Link to comment Share on other sites More sharing options...
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