Factory pto air dump overide

Is there a separate suspension dump switch? And are your switches air or electric?

 

Need ESA to turn interlock off.

 

I have the same issue with a 2012 Peterbilt 388. I only have a PTO rocker switch that Also drops the suspension at the same time. I want to separate that and have a different switch for just air suspension purposes.

 

Were you able to figure it out? I have the same issue with a 2012 Peterbilt 388. I only have a PTO rocker switch that Also drops the suspension at the same time. I want to separate that and have a different switch for just air suspension purposes.

 

Need to see it they’re air switches or electric over air.
If there air switches you take the dash apart and add a switch then figure out where the lines split to suspension dump and pto on and run separate lines from there to the respective switches.
If they’re electric it might get complicated. I would try to find where the solenoid valve’s are located there’s likely one for each function and you can run separate wires and switches. Hopefully it doesn’t go through some type of computer module it might if these are automatic or auto shift trucks