My '05 XL has a gas and electric WH. The gas is turned on and off by a switch on the control panel. The electric is hard wired and has a breaker in the breaker/fuse panel on the bed box. I can run both at the same time and I usually leave the electric on at a campground and run the gas to improve recovery time. The electric and gas will run at the same time.
Now, I am unsure what cord you are referring to since I don't have one. And, I am not sure when Forest River went to the style WH that I have. Somewhere on here there is a post that links to a plethora of Georgetown brochures that may be of some help.
Also, do you have an XL, VE or another version. These refer to the model series and the XL is a little better appointed than some of the other versions.
Check and see if you can determine the brand and maybe the maybe the model of WH. I am sure there is a manual somewhere you can download.
Life is a journey, not a destination.
2005 Georgetown 359ts
Bill & Virginia, Kentucky
Nights camped in 2011...78 , 2012...73,
Nights camped in 2013...123, 2014 ...101