Truck Won't Shut Off, TRLR and TRACT Abs On

i would look at the key ignition myself first

 

Look behind the drivers seat for a panel that pops off with a fuse box inside and has got water in it pull all the relays out and look for green on plug in on relays you can use a large zip look bag to put fuse panel in after you clean all plug ins and have it turning off like it did before?If your on the road you can buy a batt. cut/off switch like race cars use when you park it for the night.

 

Sounds like a Stephen King horror story,,

 

It's a Freightliner

 

X2 on this advice. Had a Century that would do it's P.O.S.T.(power on, self test) like I turned on the key when I was parked during moderate rain storm. Thought my truck was possessed until I called my company's breakdown. They told me to do the same thing, and sure enough, when I opened the cubby door, it was raining inside the compartment almost as much as it was outside. Wrapped the connections with plasic Saran wrap and the problems gradually stopped. It stayed that way until I got to a shop where they could reseal the truck. Not sure what seam was leaking, they just shot silicone in every crack and crevice they could. Never had another ghostly episode after that.

 

Ker thanks for coming back to tell us what fixed it, So often we never hear back from drivers that are back on the road with truck fixed ?