We personally know 1999 through 2012 Ford's shut off the 12V feed through the 7 pin connector when the ignition switch is off. Dodge and Chevy do not. We have connected our 12V pumps to so many rigs in Quartzsite to pump water from the bladders and have proven this behavior numerous times. So if you own a Ford, there is no need to disconnect the RV cord when you stop for the night (unless of course you decide to unhook
).