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That sounds nice and likely will look good. In the spirit of this thread would it make sense to create a patch and switch box to take advantage of the different programing? Within the patch box you could reroute the wiring as needed and enable switching the ground and power routes to take...

All good. You all likely no better than I. I got 0 ohms for the 'G' and 'X' tests at the P110 connector to the CTIS ECU—

Ran out and checked resistance between 'F' (ground) and 'B', 'C', and 'R' (inflate, deflate and control) all 64ohms; between 'H' (power) and 'B', 'C', and 'R' (inflate, deflate and control) all 150ohms. @Lostchain what were you expecting? edit: l'll try that— re edit: my resistors are blown...

I haven't. Why to look at 'D' neither ECU uses it?

It is a win assuming we keep our resistors healthy. The M939A2CTIS ECU (black) we received from a link @GeneralDisorder shared (thank you General) I believe is NOS. Came boxed and wrapped, still looks brand new. We originally saw 55# highway pressure. The unit connects right up to the DPA...

Thinking about how everything lines up and wishing to minimize changes to the M1078A1's wiring harness I decided to pull the 'G', 'W', and 'X' pins from the M939A2 CTIS ECU connector. Once I had pulled all three (matching the plaza Arduino CTIS, too) the ABS fault code dropped, and our...

Yes. The same issues, See this earlier post hunting for ABS solutions—

Following up on the schematics. It appears the M1078A1 and M939A2 wiring harnesses routed a few items differently at what appears to be the (M1078A1's P110) connector to the CTIS ECU. Since @GeneralDisorder has suggested the Dana Spicer ECU's do not connect across J1939 and we can connect to...

Ours seems to complain with an ABS light when the M939A2 Dana Spicer ECU is plugged in. Unplugging it turns off the ABS light. I believe the M939A2 CTIS ECU is sending something on a conflicting path for the M1078A1—

Well, I (the other burnt resistor member) had an interesting experience today and was just coming in to make an M1078 CTIS schematic to M939A2 CTIS schematic. Since replacing the resistors we have been using our plaza Arduino CTIS controller. Today while replacing the dash air brake hand...

On our M1078A1 with power and 'H' and 'M' highway pressure is 55#–

In our case replacing R12 and R13 (under the PDP on P250) resolved our ABS and J1939 faults. When we purchased our unit no circuit breaker was in the ABS fault light slot. Adding one brought the light on. Attempting to use the the diagnostic plug to read the ABS faults led use to the...

My mistake. You stated earlier that you "disconnected the M wire only". So which are providing power at the ECU now?

Do you have a photo of the unit number? Or can confirm only 'H' is supplying?

I don't know for sure: I gleen from several sources, including @Ronmar and @GeneralDisorder, these pieces: 1— CAT 3116 lacks electronic controls and data the CAT 3126 and CAT C7 engines have; 2— units with CAT 3116 use analog pulse per mile (PPM) speed signal, while CAT3126 and CAT C7 use a...

I doubt the overspeed as @Ronmar stated, because of the lack of electronic sensors on the A0. All I am suggesting is based on @GeneralDisorder statement that many programs exist, and I read, residing in the newer ECU's; that by changing the way power and ground are applied may access other...

When I last spoke with @Plasa an Arduino prototype $320 including shipping to the US–

After replacing our battery disconnect relay, installed the new Dana ECU made for an M939A. If I am reading the M939 and M1078 schematics right our new ECU can receive power or ground on H and X, or V, F, and Z. Our M1078A1 is providing power on H and M (though M is not used on the M939), so...

Life is full of choices. As a commercial real estate broker and developer I am well versed with capitalism's soullessness. I appreciate your help, knowledge shared, and graciousness in the face of my glib response—

Or create a virtual Windows 7 machine on a Linux box and start looking for the cabling to connect to that round plug–