Battery has power but the camper does not

Did you reinstall your battery after you stated that the furnace worked ok in your clicking furnace post in the TT forum? I notice that post was only 13 minutes before your post here. What did you do to your TT in that time?

First a comment:

IF the jack works properly (UP is UP, Down is Down) odds are good the battery was put in properly, at least as far as the negative wire is concerned.

Some folks, however, may connect the house power to the negative side (There is a good reason for this) If you have I will tell you how to fix it.

IF there is more than one lead on the NEGATIVE (Note if you have a multi-battery system do not include the jumper) remove them, Using a volt meter see if there is power on one of them when plugged in.. Mark the POSITIVE wire with red tape or some other red thing (Red Zip Tie).

That is a positive wire,, in fact red zip ties on all the positive wires.

(Often the house positive will be black you see).

IF there is no power to the wire.. Then you gonna need a test lamp.. For this job I'd like a 50-100 watt 12 volt Trouble light (Auto parts store) which by the way is a handy device to have in your RV tool kit anyway.

This device can be used several ways.

Hooking one lead to POSITIVE and the other to the NEGATIVE battery lead.. With at least one light inside the RV set to ON. does touching it to the smaller of the wires which were hooked to battery negative cause it to burn brightly or dimly, and if dimly did the light indoors come on? If so, the lead under "TEST" is positive. ANd you likely blew a fuse on your converter.

I have 3 test lamps here along with a small basket full of multi-meters.

One is 75 watt (I think) as described above.
one is a bayonet type "Dash Indicator" lamp in a factory made "Ice pick" like device.. One is a license plate lamp with test leads attached to the socket,, Different loads for different places.. Many times those lamps have served me well when the meter said "No problem" but.. There was a problem.

You can probably follow the negative lead pretty easily. It is usually connected to the frame.

jdavin03 wrote:
...charged the battery before I reinstalled it...

It would help if your put info in your signature or profile as to what you have. I note that you mentioned a jack so I will assume you mean tongue jack and that you have a travel trailer (TT).

My guess is that you installed the battery incorrectly and burnt the reverse polarity fuse(s) in your converter. Reverse the wires and replace the fuse(s).

Typically black is positive and white is negative.

what happens a lot when owners remove the battery and then accidently cross the battery wires, they trip a 12v resettable circuit breaker:

http://www.iboats.com/SeaDog-Resettable-Inline-Circuit-Breakers/dm/cart_id.891807368--session_id.763765416--view_id.39690

it's usually tucked in, along the trailer's A-frame and you have to press the tiny black button to reset it.

We had all of our DC voltage quit in our dealers driveway. Turned out it was some sort of an circuit breaker wired into the main line from the battery to the RV and located UNDER the RV on the outside. Once tripped it was supposed to be reset by hand! The dealer replaced it with an automatic reset C/B and we have had no more such troubles.

You need a handheld meter to measure voltage, first, across the battery terminals to see what state of charge the batteries have.

Start at the battery & follow the wires. Don't assume that anything is connected right.

Usually the jack is wired directly to the battery since they are so close. It will have an inline fuse. Battery is supplying voltage to the jack so battery works. Check for a cutoff switch or blown fuse. There maybe a inline fuse or it could be a fuse located on the 12v distribution board.

We have a battery disconnect switch near the door. It may be labeled "storage-use" or something like that. It is a momentary on switch, press the top and the battery is connected, press the bottom and the battery is disconnected.

It may be some help to tell us what your rig is.