It has nothing to do with your oxygen sensor if both lights came on. They
should go out in tandem once the engine revs past 1000rpm, or whatever it's
trigger point is for the field wire in the alternator. At which point, both
lights will go off in tandem. It sounds like you either have a bad
alternator (unlikely), a bad battery, or have hooked something up wrong. The
first thing I'd do is pull the field wire from the battery relay for the
camper setup. See if that fixes it.
Then, i'd tripple check that everything is connected properly.

Have you tried to rev it? If not, that's your problem.

-Craig
'85GL turned WESTY
BOSTIG  in the back

On Wed, May 20, 2009 at 1:19 PM, Stephen Cebula <sfcebula@yahoo.com> wrote:

> OK, so I just installed a new motor in my 85 Westy. Everything seems to be
> running great except that my charge light and my OX light on the dash are
> lit up. I checked all the connections and everything looks good. Should I
> swap the alternator and my OX sensor? Or could both lights be related to the
> same problem? Any thoughts? I also have a duel battery set up. Could that
> complicate things? Thanks
>