7 Prong Wiring. I'm not too keen on trying to run wires from the battery back to the back of the truck unless necessary. Please feel free to give it a go yourself and I hope you enjoy.
The older, outlets are Your three-prong cord will not have a green ground wire.
If you are talking abut U.
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In place of that wire a ground strap or short. Wire Work Prong Setting. by Rhonda Grandee. Actually, it would be better and safer (and cheaper) to change the dryer cord to four blade.