12 volts not working except from tow vehicle

[ericmace]

rockwood roo travel trailer: 12 volt sytem not working from battery but works when plugged into the truck. The battery has been checked for voltatge and load tested. The system also works on land power If there is a master 12 volt switch or inline fuse I sure can't find it

[donn]

There is probably a battery disconnect switch. There will also be an inline circuit breaker. When you find it, look for a really small button on the bottom and press it in to reset.

[jimh]

check the battery disconnect. mine is located as i enter my 5th wheel above the breaker box.

[ericmace]

are those items generally in the inverter?

[ericmace]

seems odd that it would work off of the truck batttery if it was a master 12 volt switch (which I can not fiind if there is one

[jimh]

Originally Posted by ericmace

seems odd that it would work off of the truck batttery if it was a master 12 volt switch (which I can not fiind if there is one

i believe it will only work on the converter when the disconnect is thrown. i haven't tried it though.

the disconnect on mine (2002 cardnal) is a red lever looking key...i think it has a chain on it.

[jimh]

nope, i misread it. the master disconnects everything but the converter. if it working on the truck, sounds like a circuit breaker. follow the wires back from the bat. they like to hide them.

[ericmace]

good to know they like to hide the switch, I will keep looking along the route of the wires

[bikendan]

you might want to post this in the Roo section under Expandables.

first, Roos don't come with a battery disconnect switch unless the dealer or previous owner installed one.

the most common reason, on Roos, for this is the inline circuit breaker switch from the battery back to the trailer. i believe it's inside the tongue frame. you can reset it. happens alot when owners hook up the battery wrong.

and you don't have an inverter, you have converter. unless someone installed one and it wouldn't have anything to do with no 12v power.

[Herk7769]

Please let us know when you find the source of your problem. We love hearing whether we were able to help you solve your issue.

My 2 cents: I had a similar problem with my 5th wheel after only 9 months of use. It was a corroded terminal connector on the red wires where the converter, tow vehicle charging line, and the battery come together. The terminal was corroded by water and salt spray. 5 minutes with a wire brush, a coat of dielectric grease, and I was back in business. It was not at all apparent looking at it from the "outside." I took the nut off and it was obvious that the terminals had lost contact with each other.

[rthrbelsewhere]

Reference: http://www.forestriverforums.com/for...tion-2847.html

Part Reference: bussmann BP/CBC-40HB-RP

That should do it. Mine was screwed into the frame on the off-door side. Strange why that location was chosen, but whatever.

Hope that helps.

Joe

P.S. I'll post pictures shortly...

[rthrbelsewhere]

I couldn't edit my original post or reply to it again, so here's the photos.




For perspective, the item in white is the bottom of my propane tank tray, which on my model, sits up against the front of the trailer.

[ericmace]

similar to the post joe put up, there was a breaker (fuse block) along the path of the wires from the front battery just under where the trailer body starts. It was bolted to the frame and well hidden above the bulk of the wires. here is a photo of it

[rthrbelsewhere]

Excellent! Enjoy

[cfsoistman]

One other possiblility. Check the ground from the battery to the frame. I had no headlights one morning and upon investigating why I found the ground wire had been connected to the frame with an aluminum trim screw. They used an oversized terminal ring connector and a washer to keep it secure. What they didn't do was remove any paint on the frame where the wire was connected. So the connection was made by just the threads on the screw. A bit of corrosion and no headlights. I wire wheeled the area of the frame to remove some of the paint, drilled a hole through the frame and bolted that sucker in place. Then sprayed the connection with battery terminal protector.
This would also explain why it works off the tow vehicle. It's getting a ground from the connection there.

[The_Stuff]

I also had a ground broke off to the frame. big big ground cable to. had to put a new bolt in.