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On the A1 the ether cylinder is back near the LBCD. I thought the A1R's used a heated fuel bowl instead?

Here is a photo of P250 terminal resistor. The only P250 label I found was a J1939 wire coming back in a huge bundle from P115, P116, X21, and a couple of 'stringers' unconnected to anything. The P250 terminal end was under the PDP, in the separated space below the circuit board above the...

Is that the plug for the contamination sensor? ABS is read at the diagnostic port next to your left knee when in the driver's seat, no?

Haven't found a P250/J250 connector as yet. It is not behind the instrument cluster. Found a terminal resistor under the PDP, on a terminal end of P250. I haven't seen J250 anywhere. There are two J1939 cables running off the diagnostic port: 1— J183 to P183; and a huge bundle that appears...

Thank you. We will keep swinging a the issue(s)—

Only J1708 is blinking, which the DPA5 manual states, whether green or red, is the signal that the adaptor is reading the truck side. The adaptor's lights come on and blink whether the computer is connected or not. I am thinking either adaptor or wiring is the next issue to explore? Perhaps...

Lancaster is on the way to the Alabama Hills. You could be camping in 10 days—

Thank you @Lostchain that certainly was one of my issues. This is still one, too: No blinky J1939 =/ I have some winter prep to do this weekend around the house, hopefully I will finish that all tomorrow. I appreciate all the help, persistence, and advice—

halleluia. Installed twice, then a third time; obvious ineptness. Still no J1939, though J1708 worked: It looks like I have plenty of issues to learn and investigate here. Could the transmission codes be related to installing Eco Hubs recently?

I'll go there again, though I recall that link just downloading. In fact I think it downloaded several times as I didn't think anything was happening and ended up having several copies in my download folder. I do not understand windows, maybe my ineptness—

I did. And the Dana one, too. The Dana software also does not work. I think the first issue is truck side since J1939 does not blink?

1— no oscilloscope; 2— will review schematic and check; 3— I have no idea how to bench flash an ECM; 4— we are working through all the electrical already replaced almost all the relays and battery disconnect, LBCD connections are next, then grounds; 5— buying another laptop is not attractive, or...

Only two choices available. No choice for 101 - DG DPA II/III/III+ - COM 1. Searched dgtech.com for older downloads without success so far. Will check the USB to serial as COM1. Being Linux and fruit, Windows settings is a f$%&@ing nightmare—

Right. Ours not blinking on J1939 is not a good sign. <CRAP!> another issue to address. Now how to determine if it is tool or truck—

Good comments. Power and J channel blinking appear to come from the truck side. When you plug in truck side what indicators do you see on your DPA adaptor?

I wish I had videoed the firmware update, though I watched intently. All the J lights winked and blinked, Mode/DPA Pass blinked, received a successful message in the update software on the laptop. J1939 not blinking feels ominous to me, with my, admittedly, lack of experience using these tools—

Yes. Diagnostic goes red, connection failed. I have tried every option choice presented. Give me a moment and I'll run back out and take photos—

hmmm. Well we connected the DPA III plus using the USB to serial. Computer talks to the Dearborn adaptor and we updated the firmware succesfully. Our M1078A1 talks to J1708 (it blinks red), though apparently not to J1939 or J1850 (no blinking, except while updating the firmware). Neither the...

New toy arrived this morning: most parts look new, last calibration done in 2019. Good thing it is Friday, if UPS brings the serial to USB cable I may need to leave early—

Better to await a replacement? Where this is going a 'Bubba threadlock' could be challenging in the future; replacing inner or outer bearings; repacking inners; replacing CTIS seals, wheel seals. When on the road choices must be made, when at home better to wait?