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There are 9 codes in the Dana manual associated with a 5 blinking lights condition. The most efficient course of action is to ask the computer what it thinks is wrong with the system. Tearing the system apart and firing the parts cannon is less efficient. Please share the codes when your reader...

As others have said, that is the kneeling valve for air transport. Mine is leaking just like yours right now and I am patiently waiting for non kneeling valve 90s to show up from @TomTime so I can fix it. Unless you plan to air transport your truck or maybe get it into a low garage, you can...

From Dana: https://dml.dana.com/assetbank-dana/assetfile/7980.zip

I had this exact same problem with my 2003. I went to NAPA and bought plugs for the hydraulic hoses and plugged them right at the cylinder. About a week after I plugged the first one, the second one failed and I plugged that side too. It took another 3 or 4 months for them to finally stop...

You are saying that creating the ECM Replacement file did not download the injector trim information? It’s been a while since I have looked at a C7 ECM replacement file, but if you open the file with an XML viewer like Chrome or Edge you will see the injector trim files encoded into the file.

Yeah, seems busticated…. There is a firmware tool that comes with the Dearborn drivers that you might see if it detects the adapter, but that one might be a lost cause.

What does the DG adapter validation tool say?

First thing you should do ASAP is pull an ECM replacement file. You absolutely need to have this on hand and backed up in places because it has truck specific information you need if your Cat ECM ever dies. Injector trim files, timing calibration, and FLS/FTS, are setting’s unique to your truck...

No prob man, I am super happy you got it all working, I feel pretty strongly that if folks take the time to understand the documentation and theories of the electronic diagnostic tools, these A1 and above variants of our trucks will stop getting this stigma of being hard to work with. At the end...

I couldn't see anywhere in that document where they mention that these pinouts are describing the cables. That information is specifically documenting the connectors on the trucks and DPAs, the cable to connect the two is left as an exercise to the reader. They mention the disparity between the...

For the folks following along, the linked document from the manufacturer is 100% accurate and can be trusted when working with factory cables.

Wasn't really quick, took about an hour but here ya go. I verified this with my multimeter on my factory Dearborn cable. This will match your Dearborn cable, all bets are off on homemade/Amazon Purchases...This cable will 100% work on DPA 4 or DPA 4 Plus

From the documentation I have seen, they are the same...

Did you read the manual for that code? It tells you what to check.

Have you tried plugging the ebay cable into your DPA4 ? If that works, rewire the homemade cable to match the factory Ebay cable, should be good to go.

From the WABCO manual: When I clear codes, light doesn't turn off until I drive the truck a little bit, usually by the time I reverse it out of the shop

That’s a nice looking seat. Where is it from?

I am jealous, mine didn’t have the rubber cover so mine is pretty weather beaten. When there are no ABS codes, when ignition is turned on, that light should briefly illuminate and then go out. If it is lit at any other time, there are codes. This is described in the manual but I believe when...

Also, I have never been able to get wabco toolbox to connect on 1939, I always have to use 1708 …. For what it’s worth

can you send a picture of the port you are talking about? 2male pins doesn’t sound right. Keep in mind, there is a “diagnostic tool” plugged into the 6pin port you have to remove to reveal the 1708 port for connecting the DPA