Noise from behind dash??

[Bruce Hull]

We have a 2003 Monaco Windsor that has developed a squeal that fades in and out as we are driving!! If we stop, it stops, and it comes and goes,  and changes pitch,  coming from  or behind the dash,  can't figure out what it is? Not the turn signal warning? Or low air, or jacks down ,, at least i don't think it is!  Does everybody have a idea what it could be? Thanks in advance don't know were to start!!

[jacwjames]

Fan blower motor???

[Bruce Hull]

4 minutes ago, jacwjames said:

Fan blower motor???

?? Is it by the dash ? Never thought of that, my mind set says that that is on the right side,, have to look!! That may just be it 😃

[Tom Cherry]

How about an AIR leak.  I had one of those and it was on the outside of the MH.  A corner of the Driver's Side window had the Caulking deteriorate. I put a piece of blue painter's tape on it.  BINGO.....GONE.  May not be yours, but it fits the bill.  High pitched....speed dependent....somewhat irritating and my hearing is the pits. 

[Bruce Hull]

Have to check, it makes sense, sounds like the same thing, can be irritating,, tks

[Rocketman3]

What about your power steering pump - is any noise related to turning the wheel?

[Jdw12345]

Windshield wind noise……. the wind might be whistling around your windshield and into the coach!

Edited October 16, 2022 by Jdw12345

[Doug and Nicki]

I have the same problem on a 2008 Dynasty. The sound follows the engine RPM’s. It increases and decreases as we drive. If I remove the radio fuse, it stops. Of course, this also disables the rear camera. There is a rat’s nest of wiring up under the dash.

[Tom Cherry]

20 hours ago, Doug and Nicki said:

I have the same problem on a 2008 Dynasty. The sound follows the engine RPM’s. It increases and decreases as we drive. If I remove the radio fuse, it stops. Of course, this also disables the rear camera. There is a rat’s nest of wiring up under the dash.

There’s “choke” or electrical noise filters for devices.  Does your rear camera have a MICROPHONE?  There nay also be an AV input on the monitor. I had to turn down a volume control on one RV Backup camera monitor that I had.  I think it was on the Camelot.

[Doug and Nicki]

My rear camera does not have an audio. I will look into noise filters to see if I can find something that may work. I appreciate the advice, Tom.