Cummins Insite

[DVT873]

I have tangled with a few of these. I have WABCO software. I don't know if anything else will get you the codes. I would think any decent HD scanner would be able to get codes. Pray it is not the HCU. They are scary money.

If you have a laptop AND an RP1210 device aka NEXIQ II or II and I think it has to be a NEXIQ II or III to properly connect. Diesel Laptops used to have a free code-reading program that was decent. I've used it a few times. It might not be free anymore.

Many problems on that system track back to bad power or grounds.

Does it say "Blue Diamond" anywhere on the VIN tag? 2015 is about when the Navistar/Ford truck marriage collapsed. The 650/750 was built at a jointly owned plant in Mexico from about 2004 to early 2015. The frames, axles, fuel, and air (if it had air brakes) tanks, brake systems were the same between a Navistar and a Ford. Different cabs and engines.

The F650/750 is an oddball to most Ford dealers and techs. Looking at it, you would think they are just a 450 or 550 on steroids. In fact, they have very little in common with the rest of the Ford lineup. It's like half fish, half dog. I've seen very few, so I'm a little hazy, but I think you will find a round Heavy Duty 9-pin and a 16-pin OBDII diag connector on them. Some of the electrical is a version of Navistar's cab controller, some of it is Ford.

If you're hooking up with a 16-pin OBDII connector, that's why you're not seeing much on the Wabco side. I'm surprised you see anything. You need the WABCO Toolbox software that will connect through the 9-pin.

Post the VIN, and I might be able to tell you a little more. Good luck.