Freightliner Columbia electrical issues.

Thank you sir

 

I have an 05' columbia with a c-15, the whole truck leaks. From the seam around the roof top, the roof fairing bolts, cozy wing window. I have sealed everything best I can, but my jakes quit fully engaging this week. It's at CAT here locally and they are saying the ecm is only showing low jake in both low and high. I hate electrical issues. Hopefully they can figure it out, anyone have that issue?

 

I have an '03 ex-ryder Columbia flat top (no sleeper windows or door) and I have all kinds of elec issues with the truck. What I have been told is water is getting into the power distribution block under the dash. I have siliconed every seam, hole or opening I can find and it seemed to help a little. Haven't had the truck won't shut off problem for about a year now. What Frtlnr told me was basically I would have to completely disassemble and remove the whole dashboard all the way to the firewall to find where the water was getting in and properly fix it.