2012 Cascadia randomly shuts off

LOL! Notice his very few posts...

Anyway, to answer your original post...did you try checking for cracked fuses? It happens all the time. And from your initial post with the truck starting immediately right back up sounds just like a cracked fuse. Check the PDM under the hood towards the wheel well, driver side. Do you have a battery quick disconnect? Sometimes those contacts just go bad after being used for a long while.

As far as the leaky fuel, it happens. Usually to check for leaks, I like using soapy water and spraying with a spray bottle on the hi pres lines and checking for bubbles--just like I would do with air leaks. It could be the feed lines that are usually brown color. Pin hole leaks. It happens.

 

Even though this thread is almost 2 years old now. lol.

Random shut off was due to a shortage inside the powernet box. The small black box on the firewall there is a bunch of wires running into. Had to order a new one directly from manufacturer. Its not something the dealer typically has on hand.

Fuel leak was the biggest pain on the ###. $0.50 crush washer on a fuel line that wraps behind the engine. Took 5 hours to fix. only way to it was to rip almost everything off the top of the engine. $600 in labor for a $0.50 part.

Truck is long gone now. Biggest mistake was buying that one.

 

Where is the power net box. Did you hear a clicking noise from inside the dash? My truck turns off while driving down highway..then turns back on but pulling power is weaker.
I don't know if it's my fuel filter or lose wire. Engine light is not on...but my mal light is.

 

Would a cracked fuse make a clicking noise? My entire truck goes dead... Then restarts like when u wake up turn key and everything turns on thrn off. Thats how my truck restarts...and whats weird is i dont even turn key....it just picks back up where it was

 

I've had a truck run perfectly fine in the shop...then all a sudden once it gets out on the road and goes up our hill, it randomly shuts off approaching a stop light, then starts right back up. Just like someone turned the key off until the RPM of the engine got back to idle.

Cracked fuses is usually the easiest to check--which is why I suggested it first. I've seen it happen multiple times.

 

must be checked PNDB not PDM .
check to see fuses are ok inside, check cables on PNDB. check to see LED light is on on PNDB and Power disconnect switch. Now little secret. Check to see your CB radio reset settings after random shut offs. The CB must be connected to original power line. So if CB reset settings then disconnecting happens right there at/in PNDB. CB's 12v power comes straight from PNDB. You can connect bulb on CB power line and monitor it. PNDBs are different for cascadias. If your truck does not have Power disconnect switch the problem will be in different area..

 

x2 on PNDB. They were having problems with the fuses wiggling out. Putting something inside the cover to keep pressure on the fuses helped. Mhyn is spot on.

 

If it's not the fuses, another thing it could be is the solenoid for the cut-off switch itself. The contacts get all gummed up from turning on...off...on..off...that they eventually wear out.

 

Hello cascadia Owners
My truck made me late for today's delivery. It was little foggy morning today in LA. I was heading east on I-210 (near Pasadena, CA) . I was driving and dreaming about good things when suddenly my horse started ######. The truck started randomly shutting off and immediately restarting. After 20-30 second of doing this the truck died. I managed to get off from heavy morning traffic to shoulder. Power was gone completely. I checked PNDB input wire and it had 12v. I had wires in my truck and shorted the input wire to 3 output terminals(1 hour job on shoulder). Power came back and I drove it back to the yard. From another truck took off PNDB and installed on my truck. Called the dealer and they said my PNDB costs $400 and it's a special order( means special junk installed on truck to make people suffer)..
I like to open failed parts to see why it failed. As we can see contacts are in good shape. I guess one of electronic component failed... My truck's odometer shows 612k now..