bobhenry wrote:Uncle Chan wrote:Well, you are both right. The diagram on the Charger plug shows the center post used for backup lamps. Whereas the standard plug configuration (the one on the TD) shows it to be used as an auxillary (AKA, charging).
So, I'll go without charging and just disconnect the wire from the battery. No worries. I always plug in a charger if/when I can anyway.
I know it has been damn near a week since this was posted but I just saw it. What caught my eye is the "AKA Charging statement".
Pin 4 in the color diagram I posted IS the charging circuit NOT the auxilary post. The auxillary post is just that "Auxillary" so trailer and truck are "Wrong ??? " The back up lights on the trailer and truck should be the center pin. Pin 4 will provide 12 volts from the tow vehicle to an on board battery (if equiped) and/or 12 volts direct to trailer to use for setting up or while camping (but will run down tows battery unless wired as hot only when key on tow vehicle is in the ON position) !
Well folks, I'm more confused now than ever.
On the Charger, the center pin is the backup.
On the F150, the center pin is charging the TD.
On the TD, the center pin is hot from the battery.
When I hook the TD up to the F150, I can charge the battery when driving.
When I hook the TD up to the Charger, my backup lights come on and I drain the TD's onboard battery.
So, I disconnect one of the hots off of the TD's battery post and no backup lights on the Charger come on and no charging of the TD while in transit.
That's what I know. And truthfully, I can live with the arrangement. I usually camp where there is power and I can just plug the battery into a charger.
by Tumbleweed_Tex » Mon Jun 07, 2010 12:39 pm 
