I have checked all grounds I can find in the engine compartment (loosen, clean and retighten) as well as the ground between the ECM mounting plate and the block on the cummins. Have checked the braided ground strap that goes from the back of the head to the cab, looks okay but really hard to get to so added a ground wire from the head to a fender ground location. One forum poster said his braided ground strap had "sawed" into a wire loom and caused the problem. This is what a dealer told him, not his observation, they also replaced the gauge cluster, they said because the voltage spikes had taken out the cluster. His description of symptoms sounded exactly like mine. They also got $1000 of his money. I can only see this strap with a mirror and flashlight but I'm sure it has not worn through any wires. I have checked connectors at the PCM (disconnect and reconnect) and have visually inspected lots of other connections. Many are very difficult to get at to re and re without removing lots of stuff. I have spent a lot of time both on the computer and on the truck. I don't mind fixing things just would like to have an idea what to fix. (The first thing I did was the grounds in the engine compartment which included the connections on the battery terminals. I know that the gauges will go to the bottom if they do not receive signals from the communication bus for 3? Seconds and the SKIM light will come on if it doesn't receive signals for 10? Seconds. This makes sense with what I see, but why intermittent signals? A loose connection? But which one? Or maybe a bad or intermittent electrical component? I would appreciate any help you can suggest. I have not had this into a dealer. Nearest one is 5 hours away, and I don't want to pay them for hours of troubleshooting. No DTC codes and one C code "AA" pcm messages not received. This also makes sense with what I am able to observe.
Edit: Also removed the gauge cluster on the weekend, re and re the connectors, everything looks good. Also checked the 1 grounding location I could get at without removing the whole dash. No change.
have the same problem?
Saturday, June 5th, 2010 AT 5:16 PM