Mack ch613

what year.

 

Search block is in the top right. I was responding to a question about Whites, White GMC, or Volvo White GMC Heavy Truck Corp. As the last emblems were before they were just Volvos.
Different brands but likely the same problem.
If you do not find mine or other posts on the subject it usually comes down to power and ground voltage drop tests. A test light is enough for what you are doing.

 

Is the lightning bolt on, on the dash? I had a 2000 CH with an E7 460. That lightning bolt electronic malfunction light always came on and the truck would randomly shut off and restart driving down the highway.
Mack dealer tried everything. Changed plugs on the wire harness to the ECM, etc. Nothing helped.

Several years later, long after I gave up and replaced that truck they finally found the issue and Mack issued a service bulletin. It is the big mass ground point inside the dash on the driver side A pillar. It has several ground wires going to it. Clean it and make sure you have a good ground.

 

No problem. Hopefully that is your problem. Like I said for years my dealer searched and tried stuff and it was something as stupid and simple as that.
And so many of those trucks were affected by the same issue.