PTO switch for 2011 388 peterbilt

The green pto emblem on the screen is prewired but needs to be programmed. The tell tale wires will be grey and located in the rh dash panel lh side tied all together. Labeled telltale 1-9 or so. Use a telltale wire that is not already hooked up.
Supply a ground to the wire and then ESA needs to be hooked up and enable the pto light to the telltale wire that just got hooked up.

As for the plug that goes into the back of the PTO switch it is a 4 pin connector p/n P20-1064.
It needs 4 terminals p/n 12047767.
Pin A, C, D are common and can be ran off the other air switches.
Pin A is Ground WHT1500
Pin C is Power ORN3600
Pin D is Backlighting BRN 2622

Pin B should be the switched ground you want to run to a telltale wire.

 

That is some great information, thank you!

 

The info pushbroom posted is correct and that's the easiest. However, I prefer to run the ground wire for the PTO indicator to the switch on the PTO itself using a normally open PTO indicator switch. Using the switched ground on the PTO switch only tells you that the switch is on/off, not if the PTO is actually engaged or not. I like the mechanical switch that shows whether or not the PTO is physically in or out. In a rare case that the PTO hangs up and wont disengage, the light will stay on. Also, those switches are known to fail allowing air to bypass in the off position. If that happens, the PTO light will come on when it tries to engage, giving you a big clue as to what that grinding noise is.

 

Running it off the actual switch on the pto is a good practice for all the reasons stated above.
We ran into problems doing it like that on the oilpatch trucks as they always tore the wire off when they were getting towed into the patch.
Depending on the application either way will work good.
The new 579s are nice as the diff lock indicator is actually ran off the switch in the diff not just the dash. But yet again on our northern trucks rocks always seem to find its a perfect target.

 

I have a question about this, I had my PTO hooked to the unused 5th wheel air toggle; whenever I engaged the PTO I got the 5th wheel warning icon on the dash and treated to a dinging bell until I disengaged it.

Using the info from Pushbroom I connected the "B" wire from the air toggle to the "Telltale 1" plug.

I connected ESA and found the editable telltales, I changed number 1 to "PTO" and hit "program" .

When I go to the "Monitor" tab in ESA and select my now PTO labeled telltale the dimmed pto icon appears in the ESA software; it also lights up when I engage the PTO so it seems to be working correctly.

The problem is that it doesn't display on my dash, there is no more alarm or 5th wheel icon but no new symbol appears when I engage the PTO; I tried assigning several other symbols to telltale 1 but the result is the same, everything looks great in the ESA software but no indication on the dash.

Did I miss a step?

 

Try flashing the cecu up to the latest version. You also could try using a different telltale wire.
If you simulate the PTO light does it come on?

 

I did try a couple other telltale wires and they did the same thing, worked great on the ESA monitor screen but nothing on the dash.

I did reflash the cecu but I got a warning when I tried to use the newest flash I had, it said this flash is not compatible with a pre 2013 emissions motor". So I flashed the latest 2012 I could find hoping it would clear things up but still nothing on the display. I also tried the simulate screen but the only icon was on the laptop screen, nothing on the dash.

Do you think it would mess anything up if I tried the post 2013 flash?

 

Whats the current flash number?
And last six of the truck s/n?

 

122058 are the last six digits of the VIN, I don't have the right laptop here to get the flash number though.