Disconnect the Neg Battery Cable
I have an 08 Jeep Wrangler Unlimited X, the owners manual gives the exact procedure for flat towing it and then at the end it said unhook the battery cable, that made sense but, it was a pain in the butt, so what I did install was a blade disconnect on the negative side, so once I'm all set up I just pop the hood, unhook the blade and off we go, simple and straight forward, and it works for me.
It's a Jeep Thing........
Jeff & Marcia .... RVM 39
2000 Beaver Patriot 425 Thunder 40'
2008 Jeep Wrangler X