five days ago, my truck sat for five days. started her up and drove off and noticed the tow/haul indicator lit up on the dash. thought i must of accidently turned it on. pushed the button, it turned off. drove down the highway and three times in 10 miles, the light came back on and the tow/haul engaged. manually turned it off each time. after the truck warmed up- it never happened again. it had been fine for the last five days and 250 miles, until this morning. it did it again, but this time, it would engage and disengage by itself! i ran a few errands this morning and it would do it continuously for five minutes-then be ok for 5-6 miles then it would do it again!. it seemed to do it less after the truck was warmed up-but still did it-but not as often.. but i obviously have a problem here. it has to be electrical, i would imagine. i am throwing no codes, either! any ideas???

 

Don't have a real idea or solution, but check out this thread...

https://www.dieseltruckresource.com/...ad.php?t=81936

Lot's of folks having strange problems caused by chaffed/shorted wires and harnesses.

 

thanks- obviously it is electrical. a frayed wiring, bad switch maybe? hoping somebody had the same problem, who could tell me what was wrong-saving me a lot of time tracing wires,etc!!

 

I would start with the button in the colum shifter.