2015 Prostar Electrical Issues

[DPS567180]

So I have a 2015 international ProStar with a Cummins ISX 15 cm2350. For the last couple weeks it has been doing some weird stuff my seat belt light will come on and then go out my engine brakes would stop working and the engine brake light will just be blinking on the dash. Whenever I would stop for about 15 to 20 minutes everything seems to be working fine. Now my radio restarts itself randomly and today my engine cut off while driving down the highway I was lucky enough to get to the shoulder quick enough. When I tried to start her back up she just cranked and cranked and wouldn't turn over. That's when the amber light came on and the dash at electrical fault. So I tried to connect insight and it would not connect so then I tried DLB and it would only connect intermittently but I couldn't get to the faults tab fast enough before it would disconnect. I took my kick panel off check my connections at the body controller everything seems to be okay no visible signs of corrosion or where I also checked the battery. After about 20 minutes I went to go start her back up and she turned over just fine. So at that point I tried to connect DLB and it worked just fine. I have a screenshot attached to this posting of the faults it found. The undercurrent codes for the lights are normal I put LEDs in when I first bought this truck years ago. It's the rest of them that I don't even know where to begin troubleshooting outside of just checking battery connections and body controller connection. Has anyone had this issue before or anyone know where to troubleshoot or how to use DLB to troubleshoot?

[Rawze]

Prostars are known for those ghost issues ... start with this...
info: https://rawze.com/forums/showthread.php?...1#pid12861

[DPS567180]

(01-06-2026 )Rawze Wrote:  Prostars are known for those ghost issues ... start with this...
info: https://rawze.com/forums/showthread.php?...1#pid12861

Thanks for pointing me in the right direction I will be trying these things. Is there a reason why you went from 5 amp to 10 amp fuse? Also what is considered a high quality fuse versus truck stop fuses?

[mikkhh]

Perhaps fuse holder contacts get also tired? How easily the fuses slide in out? Is there some resistance felt?

Speaking from my experience with French cars, since there are no Prostars anywhere near me, sometimes fuse holder and even control module terminals get loose and I just test with random pin of same size to verify and to fix just use small screwdriver / tweezers to bend them back and fix issues.

I have

[DVT873]

The second code down could be a poor connection somewhere. Check the battery cable that connects to the starter. That is used as a junction point. Several power circuits take off from there and feed the rest of the truck. The best approach is to take the nut off and pull the wires off and get a good look. The ring terminals break and lose contact, corroision can build up etc. Take a look. Also follow the grounds from the battery. Not sure on the Prostars but on the medium duty there are fuse holders in the battery box that supply different computers. The female terminals get loose. They can be squeezed back together. IF you have those fuses, follow the wiring from the batteries and look for connectors. Take thos apart and inspect. Prostars also use "cube" fuses. These sit right on the battery post. Easy to miss. Contacts between them and the wiring can get sketchy.