I am reading this thread for the primary reason of figuring out how to keep the wifi on without the truck running.
To respond to this comment - phone hotspot and tethering data has usage caps, while the truck wifi is unlimited - enough said! Add to that the fact that the cellular modem antenna appears to be installed in the shark fin on the roof, and you get stronger signals that you would with phones inside the truck. If you are actually using your phone for everything, I agree with you, but I need to use my laptop, and even if I had the cellular modem in the laptop, the laptop plans are more expensive, and NOT unlimited like the truck is. We are getting a truck camper, and streaming YouTube TV will be a primary purpose, along with the laptop. Although retired, I spend most of my time investing, and using my broker trading platform on a phone or even a tablet is way to hard to use (too easy to make mistakes in trades). Even other hotspots that you can buy have very limited data caps for the prices. I know there are some grandfathered data plans, but I don't have those. So, if I can't get enough data out of our phone hotspots, truck wifi, and any campground free wifi, Starlink is probably the next most cost effective for the many gigs of data I use in a month - and Starlink for RV's is now $150 per month, PLUS the hardware cost. So getting some more data for under $25 including taxes per month "might" get me enough data. When driving (wife driving that is) I can use my laptop and truck wifi, without interuption, but when stationary at any camp site, especially in the evening before going to sleep, it is too difficult to get out of the camper, and turn the truck back to on or ACC every 30 minutes. IF there is a way to disable that time-out is really the primary question. I actually considered trying to remote start the truck from inside the camper, which I believe will only run for 10-15 minutes if it would allow the hotspot to work for another 30 minutes after that.