07 9900i voltage issue

I have same issue where is that feed

 

Check at your batteries. The ECM feed will be a 2 or 3 wire separate power and ground feed to the ECM.

 

My 07 was doing the same thing. Was a loose connection on a battery.

 

good to know wconner. I'm going to check my truck tomorrow since I'm still having issues. I got the NO DATA LINK CONNECTION message on my CAT ID a couple of times last month but have never had a no start issue.

 

Gonna resurrect this old thread because I'm having a similar problem on an 07 9400i with a C-15. Within the last couple of months it only happened twice for several hours. Idles normally around 13.7 V, under load my voltage drops to around 12V, and under full load it would sometimes drop under 10V. Today it dropped to about 10.5 and the engine simply died while I was on a highway. When I pulled over and restarted the engine, it started up just fine but my voltage continues to drop under load.

The 1st time this happened it lasted about 4 hours and whenever my voltage dropped under 10V the engine would sometimes limp and reduce power, but it didn't die that time. After a few hours the problem just went away and the truck drove fine for a few weeks. It started happening again today.

 

Ok, did you read this thread? Your engine is feed power the same way. The voltage gets it's data from the engine.

 

had the same problem found a bad place in the wire .i spliced it together for a temp fix. dose any body know the part number for the harness that runs from the batterys to the ecm plug in at the starter. 2006 international 9900i cummins isx. the steelier ship will want a arm an a leg for it. thought i would try to find it on line thanks.