Question about 2005 Ford F-150

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Reverse Sensing System doesn't sound

RSS makes no audible noise. The fuse is ok and the switch to silence system temporarily lights up when you try to turn it off? I located the speaker for sensing system...is there any way to test it before replacing parts? Is there a secondary fuse I can't find? The Dealer just wants to start replacing sensors until they find the problem $$$$ Help
MOE

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  • MOE22 Oct 17, 2008

    Thanks....its not the speaker and it led me to look at relay which was the problem.

    Cheers

    MOE

  • Anonymous Jan 03, 2009

    Is there a fuse in a different location that I am not seeing?

  • brp582 Feb 26, 2009

    My RSS always shows Off. I press the button to activate it and it will stay on for a short period of time and then show OFF. Also, when the Off light on but when I back up the RSS beeper sounds repeatly while I am backing up with no one behind me. 2003 Mountaineer AWD.

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I want to know wich is the relay because i have the same problem thanks

Posted on Oct 11, 2009

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To test the speaker touch the wire terminal a 9 volt battery tester, make this by soldering wires to any 9 volt battery, then touch momentarly the battery leads to the speaker, the cone will move and make a slight pooping noise.

Posted on Oct 16, 2008

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Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

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I would bet that your issue is not caused by a fuse. The fact that the "Rear Sonar OFF" lamp is on and won't turn off means that the system is in fail-safe. The system has sefl-diagnosis capabilities and has found a fault.

To enter the self-diagnosis, turn the key off. Depress and hold the rear sonar switch and while holding it in, turn the key on. You will see the lamp flash and may hear a beep from the warning chime. Release the button and push and release 5 times within 10 seconds. You should see the lamp flash and another beep. Push and release the button one time. This will display fault codes that are stored in the system. For example, if a code 12 is stored, you will see 1 flash, followed by a pause and followed by 2 flashes. If there aren't any other faults stored, this will repeat.

I have seen code 12 most frequently, being that the warning chime has failed. If this is the case with your vehicle, you won't hear the beeps that I mentioned earlier, but only see the flashing of the lamp.

If this is the case, you will need to replace the chime. It is located under the cover between the steering wheel and the windshield. There is a "hood" that faces toward the steering wheel and behind that is a cover that is held down with spring-metal clips. Get a small screwdriver or panel "popper" under this cover and gently pry it up. The chime is a small speaker directly under that cover and is bolted down with 2- 5.5 mm bolts.

Once you have repaired the fault, the system will automatically reset the self-diagnosis memory.

If you have other codes, you may have an issue with one or more of the sensors located in the rear bumper. I, however, do not know those code numbers off the top of my head.

I hope that you have found this helpful!


Nissan Scope Technician- 10+ years experience in Nissan dealership.

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