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2011 Ford F-150 3.5l Supercrew
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Discussion Starter · #1 ·
Just an FYI to anyone who has or will have the Check Rear Park Aid message pop up when in reverse and have your backup sensors fail...

I've been trying to diagnose why my backup sensors will not work for quite some time now. I couldn't find a forum topic that went along with my findings. I already bought four new sensors and checked the fuses. Today I was able to dive into the wiring. I determined that the PAM was plugged in and working, and could not locate any shorts or broken wires in the harness. I had no voltage at the sensor plugs. I was able to locate a connector just above the spare tire on a crossmember that connected the rear harness to the main harness going back to the front of the truck. I didn't see any corrosion on the connector at all, but decided to apply some dielectric grease and plug it back in. Lo and behold, this was the issue. If anyone is having similar issues and can't quite figure it out, I'd suggest checking that connection to see if the break is right there.

Hope this helps someone.
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