so i tried posting in a different section and got no feed backs,
So I have an 04 excursion and just all of a sudden the rear parking assist sensors turns off without me flipping the switch. Could this be a bad sensor or did I blow a fuse somewhere, sometimes it does work @ first start only though. Has anyone had this problem before???? I didn't hit anything nor does anything look like it was hit

Thanks in advance for the help
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I would just look where I am going.

 

Right but it still doesnt fix my sensors

 

Who needs em?

 

You'll need to have it looked at by someone with a full diags system. I just bought a Snap On Modis for my shop and it will do the parking system - found that my right - outer sensor is the one causing me issues. I'm not going to fix it - I use the mirrors and the backup camera to move the beast.

 

If it works sometimes i dont think its a fuse.

Here are a few more options,
If it works sometimes at start try:

1) use emergency brake
2) turn ignition to on (just before it starts engine)
3) put truck in reverse
4) have someone go to each sensor and cover one at a time
if you get beeping sound the one covered is GOOD.

Original part is about $90. very easy to install.

OR

Most Dealers charges $94 to plug in and give an estimate. If you go this route you will pay about $200-$249

OR in my case,

I went in to dealer, went to parts department got price of part about $90.
Then approached my service advisor and the tech i use and asked for a quote to replace 1 sensor. Tech said its a 30 minute job plus parts. I ended up paying 149.OTD. 1 year warranty parts and labor.



Hope this helps,
Michael

 

Souds like a plan I'll try #3
Thanks for the info bro I'm gonna try in the morn.

 

I too have just encountered this same problem. I have tried the reverse thing and your suppose to hear a sound when you tap them or cover them. This was not the case for me on all 4. I have also read that if the speaker goes bad you get the same effect. Now i'm trying to figure out how to test the speaker..

If I figure anything out I will update this thread.

 

I found this info in another post.

• If you trust your wife, put her in the drivers seat.
• Start the truck (I REALLY trust my wife)
• Ebrake on.
• Put it in reverse.
• Touch each sensor. You should feel a slight tapping on each sensore. If one sensor does not give you the tapping, then it is bad and should be replaced.
• If all sensors give you the tapping then it could be the backup speaker is going bad.
• Remove the passenger rear quarter panel cover. I started on the outside edge (near the rear opening) and pushed in towards the wing window.
• Disconnect the speaker.
• Put an meter to the speaker to check continuity. If it doesn't have continuity then it's bad. Replace the speaker. I used one from a old birthday card and resoldered the stock connectors to it. But I hear the stock speaker is pretty cheap.

Also with mine, the parking sensor light on the switch was constantly on. This lead me to the speaker being the problem.

 

i found that on both my 2000 and 2002 that the pass side outside sensor was bad on both. i just put a drivers side sensor off my '00 in my '02 and it works perfect. same part #s for left and right. the difference is whether its inside or outside.

 

So I tried this morning and it just turns off automaticly I even left itin reverse n just turned the key on(not cranking it) and it beeps but goes into the off switch immediatly I might just have to take it to the dealership as much as I don't want to spend the $$ but I sorta rely on the rear sensors in these tight NYC parking spots

Unless anyone else has answer

 

Check the speaker.

 

its not the speaker because it beeps for that split second the the off button stays on and wont turn back on im confused.

 

I still think chances are high you have a bad sensor, since your speaker beeps.

 

To Add more mystery to my situation I hooked up a trailer and it started working , I'm gonna slide under and check all the harnesses