porthole
Retired
No Rod they are good. I have been having a bit on my own, it's the only one I know of.
Might be because of my 4 batteries
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Are referring to the truck keeping the batteries up?
If you are, research the Ford charging system and wiring some. I think you find that what is available at the 7 way will not be anywhere what you think it should be. Even with the twin heavy duty alternator option.
For instance, the wire is the minimum gauge required to not burn up
Running a new 10 gauge wire pair directly from the battery or starter lugs would probably get you what you need at the 7-way. But bypass that and use industrial battery connectors to the RV batteries.