Tow Vehicle charging

[Evergreen]

Hi all, well we have been pretty busy this winter resto-modding our new to us 1983 13' Scamp. Will post some pictures of the finished product once the dust settles (literally, I have been doing a bunch of fiberglass work) . I do have a question about tow vehicle charging. Currently we just flat 4 pin connector, since I am going to be putting 2 6v golf cart batteries in (I put in a new high efficiency 12v fridge, solar panels are ready to mount and an onboard 110v charger) I also want to keep the batteries topped up going down the road. I have a battery isolator on order but I was wondering what kind of plug people are using. One other thing, our camper camp with electric brakes, not sure of they work but if I am replacing the plug can I get one that does it all, lights, charging and brake control? I see the 7 pin with a separate 4 pin connector on etrailer.com. Will this also handle the house bank charging?

[ken h]

A 7 way plug can do it all ,here is a wiring diagram

[Evergreen]

Would it be the wire labeled "Auxiliary" ?

[Andrew GPSMapNut]

Originally Posted by Evergreen

Would it be the wire labeled "Auxiliary" ?

No. The "auxiliary" is most commonly used (factory pre-wired) for buck-up lights. Contact #4 is used as 12V feed that can be used for battery charging.
Trailer Wiring Diagrams | etrailer.com has excellent trailer wiring info.

[Evergreen]

Ok, thanks all. With those examples I am all set. Now I just need to order the parts.

[DannyH]

Evergreen, who is the manufactor of your battery isolator? I'm thinking of getting one for our rig.

[Evergreen]

Originally Posted by DannyH

Evergreen, who is the manufactor of your battery isolator? I'm thinking of getting one for our rig.

Well, to be honest I sort of cheaped out on it (we have taken a $1200 camper and put about another $3500 in it over the winter so I am trying to slow down a bit on it...). I ended up getting it off Ebay Sure Power 702 Single Input Dual Battery Isolator New - eBay (item 380323203834 end time Mar-13-11 19:09:51 PDT). I figured for $26 it was worth a shot.