Air leak under dash

[SPO]

Hey everyone, I have found one of my air leaks under the dash. It is coming out of this component on the driver side way up on the fire wall. I thought a screw was missing where the red arrow is pointing but after posting on Facebook and getting a few responses people said that there is no screw missing however they did not say how I stop the leak. Any help would be appreciated, thanks

 

[Elk1111]

I’m not exactly positive on this but that looks like your low air pressure switch that shuts off the buzzer once you build air pressure. I would try replacing it.
Type in M35a2 low pressure switch and see if it looks the same.

 

[SPO]

I’m not exactly positive on this but that looks like your low air pressure switch that shuts off the buzzer once you build air pressure. I would try replacing it.
Type in M35a2 low pressure switch and see if it looks the same.

Yeah, that's what people told me it was on Facebook, they just didn't tell me what could be wrong. I'll see about replacing it and hope that takes care of the issue

 

[VPed]

I just solved that same problem on my deuce. It is the low air pressure switch. I removed it, cleaned it and reinstalled. It is two parts threaded together with the switch components within. The problem was that the threaded connection was loose. You may be able to just reach up there with pliers and tighten it in place but it is not that difficult to remove it.

 

[VPed]

Wow, just noticed this is a regional thread. Howdy neighbors.

 

[Elk1111]

Hello from right up the interstate!’